Pub Date : 2023-01-01DOI: 10.2480/agrmet.d-22-00025
H. Oue
{"title":"Comparisons of the stomatal conductance and electron transport rate of three Japanese rice cultivars including Himenorin in Ehime Prefecture","authors":"H. Oue","doi":"10.2480/agrmet.d-22-00025","DOIUrl":"https://doi.org/10.2480/agrmet.d-22-00025","url":null,"abstract":"","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69170670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2480/agrmet.d-23-00021
R. Matsuda, Moe Shinohara, Liyao Yu, Kazuhiro Fujiwara
{"title":"Responses of leaf mass per area of cucumber seedlings to light with diurnal and day‑to‑day changes in photosynthetic photon flux density","authors":"R. Matsuda, Moe Shinohara, Liyao Yu, Kazuhiro Fujiwara","doi":"10.2480/agrmet.d-23-00021","DOIUrl":"https://doi.org/10.2480/agrmet.d-23-00021","url":null,"abstract":"","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":"39 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69170744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.2480/agrmet.d-22-00037
Nono Sugawara, Mei Numazawa, Ryo Abe, M. Nishiyama, K. Kato, Y. Kanayama
{"title":"Effect of light quality of long-day treatments on flowering in Delphinium","authors":"Nono Sugawara, Mei Numazawa, Ryo Abe, M. Nishiyama, K. Kato, Y. Kanayama","doi":"10.2480/agrmet.d-22-00037","DOIUrl":"https://doi.org/10.2480/agrmet.d-22-00037","url":null,"abstract":"","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":"19 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69170703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract: Approximately 50% of autosomal dominant polycystic kidney disease (ADPKD) patients have gross hematuria, but few cases of bladder cancer complications are known. We report a case of a 49-year-old female ADPKD patient with bladder cancer, who was presented to our hospital 4 months after the onset of gross hematuria. A computed tomography (CT) scan showed a bladder mass, enlarged pelvic and left inguinal lymph nodes, multiple liver cysts, and a polycystic kidney. Based on family history, CT scan results, and lymph node biopsy, we diagnosed the patient with uroplakin III-negative bladder cancer with squamous metaplasia and ADPKD. The patient was treated with systemic chemotherapy but died 2 months after the definitive diagnosis. The delayed diagnosis was disastrous, and malignancy should be considered in the differential diagnosis when symptoms suggestive of malignancy such as hematuria appear. Particularly, uroplakin III-negative advanced bladder cancer has a poor prognosis and requires early diagnosis and treatment.
摘要：约50%的常染色体显性多囊肾（ADPKD）患者会出现毛细血尿，但很少有膀胱癌并发症的病例。我们报告了一例 49 岁女性 ADPKD 患者的膀胱癌病例，她在出现毛细血尿 4 个月后到我院就诊。计算机断层扫描（CT）显示她有膀胱肿块、盆腔和左腹股沟淋巴结肿大、多发性肝囊肿和多囊肾。根据家族病史、CT 扫描结果和淋巴结活检结果，我们诊断患者患有尿路蛋白 III 阴性膀胱癌伴鳞状化生和 ADPKD。患者接受了全身化疗，但在确诊后两个月死亡。延迟诊断是灾难性的，当出现血尿等提示恶性肿瘤的症状时，应在鉴别诊断中考虑恶性肿瘤。尤其是尿激酶 III 阴性的晚期膀胱癌预后较差，需要早期诊断和治疗。
{"title":"Delayed diagnosis of bladder cancer in a patient with autosomal dominant polycystic kidney disease.","authors":"Hirotaka Suto, Yumiko Inui, Shinichiro Nishikawa, Atsuo Okamura","doi":"10.4103/jcrt.jcrt_1310_22","DOIUrl":"10.4103/jcrt.jcrt_1310_22","url":null,"abstract":"<p><strong>Abstract: </strong>Approximately 50% of autosomal dominant polycystic kidney disease (ADPKD) patients have gross hematuria, but few cases of bladder cancer complications are known. We report a case of a 49-year-old female ADPKD patient with bladder cancer, who was presented to our hospital 4 months after the onset of gross hematuria. A computed tomography (CT) scan showed a bladder mass, enlarged pelvic and left inguinal lymph nodes, multiple liver cysts, and a polycystic kidney. Based on family history, CT scan results, and lymph node biopsy, we diagnosed the patient with uroplakin III-negative bladder cancer with squamous metaplasia and ADPKD. The patient was treated with systemic chemotherapy but died 2 months after the definitive diagnosis. The delayed diagnosis was disastrous, and malignancy should be considered in the differential diagnosis when symptoms suggestive of malignancy such as hematuria appear. Particularly, uroplakin III-negative advanced bladder cancer has a poor prognosis and requires early diagnosis and treatment.</p>","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":"42 1","pages":"S925-S927"},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91133486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-10DOI: 10.2480/agrmet.d-22-00019
R. Matsuda
I investigated the effects of seasonal fluctuations in light availability for plants before gene transfer on the inter‑batch variation of target recombinant protein productivity in a viral vector‑based transient gene expression system. Nicotiana benthamiana plants were grown five times in different seasons, either in a growth chamber ( GC ) under sole‑source ( solely electric ) lighting or in a temperature‑controlled greenhouse ( GH ) under sunlight until agroinfiltration for gene transfer. The plants were then further grown in a shared growth chamber to allow accumulation of hemagglutinin ( HA ) until harvest. The coefficient of variation of leaf HA content per plant among GH batches was more than twice that among GC batches. The greater variation of leaf HA content per plant in GH was due to the higher coefficient of variation ( CV ) of leaf biomass and the slightly higher CV of leaf HA content per biomass, the former being primarily due to the variation in cumulative photosynthetic photon flux density before gene transfer. There was a significant linear regression between leaf HA content per biomass at harvest and leaf biomass at the timing of gene transfer across growth conditions ( GC or GH ) and seasons. This regression indicates that the variation of leaf biomass or any related variables immediately before gene transfer can account for a significant part of the observed variation of leaf HA accumulation per plant at harvest. Thus, strictly regulated plant growth conditions before gene transfer are crucial to reducing the inter‑batch variation of HA productivity. I conclude that indoor facilities with sole‑source lighting are more appropriate than greenhouses, not only for plant cultivation after gene transfer but also before gene transfer.
{"title":"Inter-batch variability of hemagglutinin content transiently expressed in Nicotiana benthamiana plants grown under sole-source lighting and sunlight conditions before gene transfer","authors":"R. Matsuda","doi":"10.2480/agrmet.d-22-00019","DOIUrl":"https://doi.org/10.2480/agrmet.d-22-00019","url":null,"abstract":"I investigated the effects of seasonal fluctuations in light availability for plants before gene transfer on the inter‑batch variation of target recombinant protein productivity in a viral vector‑based transient gene expression system. Nicotiana benthamiana plants were grown five times in different seasons, either in a growth chamber ( GC ) under sole‑source ( solely electric ) lighting or in a temperature‑controlled greenhouse ( GH ) under sunlight until agroinfiltration for gene transfer. The plants were then further grown in a shared growth chamber to allow accumulation of hemagglutinin ( HA ) until harvest. The coefficient of variation of leaf HA content per plant among GH batches was more than twice that among GC batches. The greater variation of leaf HA content per plant in GH was due to the higher coefficient of variation ( CV ) of leaf biomass and the slightly higher CV of leaf HA content per biomass, the former being primarily due to the variation in cumulative photosynthetic photon flux density before gene transfer. There was a significant linear regression between leaf HA content per biomass at harvest and leaf biomass at the timing of gene transfer across growth conditions ( GC or GH ) and seasons. This regression indicates that the variation of leaf biomass or any related variables immediately before gene transfer can account for a significant part of the observed variation of leaf HA accumulation per plant at harvest. Thus, strictly regulated plant growth conditions before gene transfer are crucial to reducing the inter‑batch variation of HA productivity. I conclude that indoor facilities with sole‑source lighting are more appropriate than greenhouses, not only for plant cultivation after gene transfer but also before gene transfer.","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48488385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-10DOI: 10.2480/agrmet.d-22-00012
K. Murakami, S. Inoue, M. Nemoto, Y. Kominami, M. Inatsu, T. Hirota
The use of agricultural machines for field operations is often restricted by the soil status, which is determined by the meteorological conditions several days before the operation. While a projected rise in air temperature caused by climate change may promote evapotranspiration and incur positive impacts on the use of agricultural machines, intensified rainfall may have negative effects. Here, we provide probabilistic estimates of climate change impacts on meteorological constraints on the field workability of agricultural machines in Hokkaido, Japan. Analyses based on historical meteorological data and machinery operation logs recorded at two agricultural research stations revealed that operations were concentrated on days with a smaller antecedent precipitation index ( API ) . A simple derivative that reflects a maximum API value for conducting a certain field operation, termed threshold API, was proposed to evaluate meteorological constraints on field operations. The threshold API values for operations that were vulnerable to soil conditions ( e.g., sowing and soil preparation ) and/or in fields with poor drainage soil were small; therefore, this threshold should be a reasonable and quantitative measure of the meteorological constraint on field workability. Using 1 km gridded API values under historical and future climates calculated from a large ensemble dataset of daily mean air temperature and precipitation, we separated workable and unworkable days from June to October based on a threshold value of 5 mm and calculated changes in the monthly numbers of total workable days and consecutive unworkable days. While there were slight negative effects in several of the southern and central regions under a 4-K warmer future climate, positive changes prevailed in the total workable days and consecutive unworkable days in the other regions and months. The present results facilitate a probabilistic discussion of changes in agricultural calendars and suggest that climate change may extend the agricultural season in Hokkaido.
{"title":"Projected changes in field workability of agricultural machinery operations for upland crop production with +4 K warming in Hokkaido, Japan","authors":"K. Murakami, S. Inoue, M. Nemoto, Y. Kominami, M. Inatsu, T. Hirota","doi":"10.2480/agrmet.d-22-00012","DOIUrl":"https://doi.org/10.2480/agrmet.d-22-00012","url":null,"abstract":"The use of agricultural machines for field operations is often restricted by the soil status, which is determined by the meteorological conditions several days before the operation. While a projected rise in air temperature caused by climate change may promote evapotranspiration and incur positive impacts on the use of agricultural machines, intensified rainfall may have negative effects. Here, we provide probabilistic estimates of climate change impacts on meteorological constraints on the field workability of agricultural machines in Hokkaido, Japan. Analyses based on historical meteorological data and machinery operation logs recorded at two agricultural research stations revealed that operations were concentrated on days with a smaller antecedent precipitation index ( API ) . A simple derivative that reflects a maximum API value for conducting a certain field operation, termed threshold API, was proposed to evaluate meteorological constraints on field operations. The threshold API values for operations that were vulnerable to soil conditions ( e.g., sowing and soil preparation ) and/or in fields with poor drainage soil were small; therefore, this threshold should be a reasonable and quantitative measure of the meteorological constraint on field workability. Using 1 km gridded API values under historical and future climates calculated from a large ensemble dataset of daily mean air temperature and precipitation, we separated workable and unworkable days from June to October based on a threshold value of 5 mm and calculated changes in the monthly numbers of total workable days and consecutive unworkable days. While there were slight negative effects in several of the southern and central regions under a 4-K warmer future climate, positive changes prevailed in the total workable days and consecutive unworkable days in the other regions and months. The present results facilitate a probabilistic discussion of changes in agricultural calendars and suggest that climate change may extend the agricultural season in Hokkaido.","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46089068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-10DOI: 10.2480/agrmet.d-22-00003
T. Hirano, Guan Xhuan Wong, Joseph Wenceslaus Waili, Kim San Lo, Frankie Kiew, Edward Baran Aeries, R. Hirata, Kiwamu Ishikura, M. Hayashi, Shoko Murata, T. Shiraishi, Masayuki Itoh, L. Melling
− Abstract Palm oil accounts for about 40 % of the global demand of vegetable oil. To meet the demand, oil palm plantations have expanded in the humid tropics at the expense of tropical forests. Land conversion begins with clear cutting and generates much woody debris, which was stacked in rows. Woody debris decomposes and emits carbon dioxide ( CO 2 ) , but the time course of the decomposition is not well understood, especially at the early stage. Thus, we measured carbon ( C ) stock in woody debris in a newly established plantation after clear cutting of a secondary peat swamp forest in Sarawak, Malaysia. A litter bag method was applied to examine the decomposition of woody debris scattered on the ground. Also, we periodically measured apparent cross‑sectional area ( ACSA ) of a stacking row ( about 5 m wide and 90 m long ) assuming that the cross‑sectional form was triangular. The C stock of the stacking row was estimated from ACSA and measured C fractions using a significant sigmoidal relationship. The decomposition rate constants ( k ) for C content were determined to be 0.231 ‑ 0.313 yr ‑1 for ground woody debris and 0.459 yr ‑1 for stacked woody debris. In addition, the total decomposition of the aboveground woody debris proceeded according to another k of 0.440 yr ‑1 during the experimental period of 740 days. The total C stock of aboveground woody debris was 48.4 Mg C ha ‑1 at the beginning of the field experiment, about 16 months after clear cutting. The C stock accounted for 63 % of the C of forest aboveground biomass. Despite the uncertainty in the spatial representativeness, we think that simply measurable ACSA is useful to quantify the C stock of stacked woody debris. The technique could be applicable to large‑area estimation using drone technology.
−摘要棕榈油约占全球植物油需求的40%。为了满足需求，以牺牲热带森林为代价，在潮湿的热带地区扩大了油棕种植园。土地转换从砍伐开始，并产生大量的木质碎片，这些碎片成排堆放。木质碎屑分解并释放二氧化碳（CO2），但分解的时间过程尚不清楚，尤其是在早期阶段。因此，我们在马来西亚砂拉越的次生泥炭沼泽林砍伐后，测量了新建立的种植园中木质碎屑中的碳（C）含量。采用垃圾袋法检测散落在地面上的木质碎屑的分解情况。此外，我们定期测量堆叠行（约5米宽、90米长）的表观横截面积（ACSA），假设横截面形式为三角形。堆叠行的C存量由ACSA估计，并使用显著的S型关系测量C分数。对于地面木质碎屑，C含量的分解速率常数（k）为0.231‑0.313 yr‑1，对于堆叠木质碎屑，分解速率常数为0.459 yr‑。此外，在740天的实验期间，地上木质碎屑的总分解按照0.440 yr-1的另一个k进行。在野外试验开始时，即清割后约16个月，地上木质碎屑的总碳储量为48.4 Mg C ha‑1。碳储量占森林地上生物量碳的63%。尽管空间代表性存在不确定性，但我们认为，简单可测量的ACSA有助于量化堆放的木质碎片的碳储量。该技术可应用于使用无人机技术的大面积估计。
{"title":"Carbon loss from aboveground woody debris generated through land conversion from a secondary peat swamp forest to an oil palm plantation","authors":"T. Hirano, Guan Xhuan Wong, Joseph Wenceslaus Waili, Kim San Lo, Frankie Kiew, Edward Baran Aeries, R. Hirata, Kiwamu Ishikura, M. Hayashi, Shoko Murata, T. Shiraishi, Masayuki Itoh, L. Melling","doi":"10.2480/agrmet.d-22-00003","DOIUrl":"https://doi.org/10.2480/agrmet.d-22-00003","url":null,"abstract":"− Abstract Palm oil accounts for about 40 % of the global demand of vegetable oil. To meet the demand, oil palm plantations have expanded in the humid tropics at the expense of tropical forests. Land conversion begins with clear cutting and generates much woody debris, which was stacked in rows. Woody debris decomposes and emits carbon dioxide ( CO 2 ) , but the time course of the decomposition is not well understood, especially at the early stage. Thus, we measured carbon ( C ) stock in woody debris in a newly established plantation after clear cutting of a secondary peat swamp forest in Sarawak, Malaysia. A litter bag method was applied to examine the decomposition of woody debris scattered on the ground. Also, we periodically measured apparent cross‑sectional area ( ACSA ) of a stacking row ( about 5 m wide and 90 m long ) assuming that the cross‑sectional form was triangular. The C stock of the stacking row was estimated from ACSA and measured C fractions using a significant sigmoidal relationship. The decomposition rate constants ( k ) for C content were determined to be 0.231 ‑ 0.313 yr ‑1 for ground woody debris and 0.459 yr ‑1 for stacked woody debris. In addition, the total decomposition of the aboveground woody debris proceeded according to another k of 0.440 yr ‑1 during the experimental period of 740 days. The total C stock of aboveground woody debris was 48.4 Mg C ha ‑1 at the beginning of the field experiment, about 16 months after clear cutting. The C stock accounted for 63 % of the C of forest aboveground biomass. Despite the uncertainty in the spatial representativeness, we think that simply measurable ACSA is useful to quantify the C stock of stacked woody debris. The technique could be applicable to large‑area estimation using drone technology.","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47746959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-10DOI: 10.2480/agrmet.d-21-00048
Diep Nguyen Thi Hong, K. Tatsumi, Minh Vo Quang, M. Yamashita, Truong Phan NHAT, Nhi Nguyen Thi BICH
{"title":"Coastline dynamics and erosion/accretion in the estuaries of the lower Mekong Delta, Vietnam","authors":"Diep Nguyen Thi Hong, K. Tatsumi, Minh Vo Quang, M. Yamashita, Truong Phan NHAT, Nhi Nguyen Thi BICH","doi":"10.2480/agrmet.d-21-00048","DOIUrl":"https://doi.org/10.2480/agrmet.d-21-00048","url":null,"abstract":"","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69170589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-10DOI: 10.2480/agrmet.d-22-00014
R. Kimura
The Taklimakan and Gobi deserts and the Loess Plateau in China and Mongolia are generally recognized source areas for Asian dust. However, dust emissions depend on meteorological factors such as air pressure and land surface conditions, and precise information on land surface conditions in the dust source areas and the frequency of dust events in Japan is lacking. In this study, interannual changes of land surface conditions in the springtime since 2000 were examined in a target source region ( 35 ° N - 50 ° N, 100 ° E - 120 ° E ) . Back trajectory analysis results showed that most dust trajectories of the past 10 years mainly followed three routes passing over this target region. Both the number of Asian dust events observed in Japan and the area with a threshold wind speed U t of <10 m s -1 in the target region significantly decreased after 2000. Further, the area of U t < 10 m s -1 and the number of events were significantly correlated. These results may reflect a decrease in the bare land surface area, which is associated with dust outbreaks.
中国和蒙古的塔克拉玛干沙漠、戈壁沙漠和黄土高原是公认的亚洲沙尘源区。然而，沙尘排放取决于气压和地表条件等气象因素，而日本缺乏关于沙尘源地区地表条件和沙尘事件频率的精确信息。在目标源区(35°N ~ 50°N, 100°E ~ 120°E)，研究了2000年以来春季地表条件的年际变化。反轨迹分析结果表明，近10年沙尘轨迹主要沿3条路线经过该目标区域。2000年以后，日本观测到的亚洲沙尘事件数量和目标区域阈值风速U t <10 m s -1的面积均显著减少。U t < 10 m s -1的面积与事件数呈显著相关。这些结果可能反映了裸露土地面积的减少，这与沙尘爆发有关。
{"title":"Interannual changes of land surface conditions in Asian dust source regions since 2000","authors":"R. Kimura","doi":"10.2480/agrmet.d-22-00014","DOIUrl":"https://doi.org/10.2480/agrmet.d-22-00014","url":null,"abstract":"The Taklimakan and Gobi deserts and the Loess Plateau in China and Mongolia are generally recognized source areas for Asian dust. However, dust emissions depend on meteorological factors such as air pressure and land surface conditions, and precise information on land surface conditions in the dust source areas and the frequency of dust events in Japan is lacking. In this study, interannual changes of land surface conditions in the springtime since 2000 were examined in a target source region ( 35 ° N - 50 ° N, 100 ° E - 120 ° E ) . Back trajectory analysis results showed that most dust trajectories of the past 10 years mainly followed three routes passing over this target region. Both the number of Asian dust events observed in Japan and the area with a threshold wind speed U t of <10 m s -1 in the target region significantly decreased after 2000. Further, the area of U t < 10 m s -1 and the number of events were significantly correlated. These results may reflect a decrease in the bare land surface area, which is associated with dust outbreaks.","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69170620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.2480/agrmet.d-21-00049
A. Hama, Minami Sato, Yuta Tsukamoto, N. Matsuoka
{"title":"Estimation of sunlight conditions through a drone-mounted solar irradiation sensor","authors":"A. Hama, Minami Sato, Yuta Tsukamoto, N. Matsuoka","doi":"10.2480/agrmet.d-21-00049","DOIUrl":"https://doi.org/10.2480/agrmet.d-21-00049","url":null,"abstract":"","PeriodicalId":56074,"journal":{"name":"Journal of Agricultural Meteorology","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45610103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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