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The Shift to Synergies in China’s Climate Planning: Aligning Goals with Policies and Institutions 中国气候规划向协同效应转变:将目标与政策和制度结合起来
IF 3.7 Q2 Earth and Planetary Sciences Pub Date : 2023-11-28 DOI: 10.3390/cli11120234
Qianyi Cai, Eric Zusman, Guobi Meng
China has long sought to address climate change in line with other development goals. However, research supporting this alignment often employs data-driven models that downplay the policies and institutions needed to achieve the multiple benefits that studies feature in their analyses. This oversight is troubling because it neglects gaps between goals and the actual integration of climate and development or co-control of air pollution and greenhouse gases (GHGs). Additionally, this oversight may overlook growing implementation challenges as China pursues synergies between net-zero emissions, biodiversity, and circularity. This article illustrates these challenges by tracing the goals and policies/institutions in China over three phases: (1) integration (1979–2010), (2) co-control (2011–2019), and (3) synergies (2020–present). This article argues that China needs to strengthen the science–policy interface and ensure that new market-based policy instruments (such as emissions trading programs) as well as the leadership responsibility system incentivize reductions in overall GHG emissions while shrinking ecological footprints in the shifts to synergies.
长期以来,中国一直寻求在实现其他发展目标的同时应对气候变化。然而,支持这种协调的研究往往采用以数据为导向的模型,淡化了实现研究分析中所强调的多重效益所需的政策和制度。这种疏忽令人担忧,因为它忽视了目标之间的差距以及气候与发展或空气污染与温室气体(GHGs)共同控制的实际结合。此外,在中国追求净零排放、生物多样性和循环性之间的协同作用时,这种疏忽可能会忽视日益增长的实施挑战。本文通过追溯中国在三个阶段的目标和政策/制度来说明这些挑战:(1)整合(1979-2010 年),(2)共控(2011-2019 年),(3)协同(2020 年至今)。本文认为,中国需要加强科学与政策的衔接,并确保新的市场化政策工具(如排放交易计划)以及领导责任制能够激励温室气体的总体减排,同时在向协同转变的过程中减少生态足迹。
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引用次数: 0
The Contribution of Low-Carbon Energy Technologies to Climate Resilience 低碳能源技术对气候复原力的贡献
IF 3.7 Q2 Earth and Planetary Sciences Pub Date : 2023-11-21 DOI: 10.3390/cli11120231
L. Proskuryakova
The UN vision of climate resilience contains three independent outcomes: resilient people and livelihoods, resilient business and economies, and resilient environmental systems. This article analyzes the positive contributions of low-carbon energy technologies to climate resilience by reviewing and critically assessing the existing pool of studies published by researchers and international organizations that offer comparable data (quantitative indicators). Compilation, critical analysis, and literature review methods are used to develop a methodological framework that is in line with the UN vision of climate resilience and makes it possible to compare the input of low-carbon energy technologies climate resilience by unit of output or during their lifecycle. The framework is supported by the three relevant concepts—energy trilemma, sharing economy/material footprint, and Planetary Pressures-Adjusted Human Development Index. The study identifies indicators that fit the suggested framework and for which the data are available: total material requirement (TMR), present and future levelized cost of electricity (LCOE) without subsidies, CO2 emissions by fuel or industry, lifecycle CO2-equivalent emissions, and mortality rates from accidents and air pollution. They are discussed in the paper with a focus on multi-country and global studies that allow comparisons across different geographies. The findings may be used by decision-makers when prioritizing the support of low-carbon technologies and planning the designs of energy systems.
联合国的气候复原力愿景包含三个独立的成果:具有复原力的人民和生计、具有复原力的企业和经济以及具有复原力的环境系统。本文通过回顾和批判性评估由研究人员和国际组织发表的、可提供可比数据(定量指标)的现有研究,分析了低碳能源技术对气候复原力的积极贡献。通过汇编、批判性分析和文献综述等方法,制定了一个符合联合国气候复原力愿景的方法框架,从而可以比较低碳能源技术在单位产出或生命周期内对气候复原力的投入。该框架得到了三个相关概念的支持--能源三难、共享经济/物质足迹和经行星压力调整的人类发展指数。该研究确定了符合建议框架且数据可用的指标:材料总需求(TMR)、目前和未来无补贴的平准化电力成本(LCOE)、燃料或行业二氧化碳排放量、生命周期二氧化碳当量排放量以及事故和空气污染死亡率。本文重点讨论了多国和全球研究,以便对不同地区进行比较。决策者在优先支持低碳技术和规划能源系统设计时,可以利用这些研究结果。
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引用次数: 0
Temporal Changes in Tourists’ Climate-Based Comfort in the Southeastern Coastal Region of Spain 西班牙东南沿海地区游客基于气候舒适度的时间变化
IF 3.7 Q2 Earth and Planetary Sciences Pub Date : 2023-11-17 DOI: 10.3390/cli11110230
David Espín-Sánchez, Jorge Olcina-Cantos, C. Conesa-García
In the context of climate change, where the average temperature has risen in recent decades on the Mediterranean coast of the Iberian Peninsula, bioclimatic indicators show an increase in thermal discomfort. This is especially relevant in regions with a clear focus on mass and seasonal sun and beach tourism, with a large number of tourists experiencing discomfort in hot and humid summer environments. The research analyses the temporal evolution (1967–2022) of the coasts of the provinces of Alicante and Murcia (Spain) using the Climate Comfort Index (CCI), divided into four different regions. Used are 14 coastal meteorological observatories divided into four regions. Trend analysis was performed using the Mann–Kendall (MKT) and Theil–Sen (TSE) tests. The results revealed a loss of climate comfort during the summer season (−0.3 to −0.4/decade), as well as an expansion of the warm period toward June and early September, with an increase of 38.7 days in “hot” thermal comfort. The increase in thermal discomfort in the summer is influenced by an increase in average temperature (0.5 to 0.7 °C/decade) and a reduction in the average relative humidity (−1.0 to −2.1%/decade) and wind speed (−0.2 to −0.9 km/h/decade). In the last 22 years (2000–2022), decreases (p  ≤ 0.05) have been recorded in July and September (−0.2 to −0.4/decade), reaching “excessive heat” climatic comfort thresholds for the first time. Finally, there has been an increase in thermal comfort in winter, especially during December in recent years (2000–2022).
近几十年来,伊比利亚半岛地中海沿岸的平均气温不断上升,在气候变化的背景下,生物气候指标显示热不适感有所增加。这在以大众旅游和季节性阳光海滩旅游为主的地区尤为明显,大量游客在炎热潮湿的夏季环境中感到不适。该研究利用气候舒适度指数(CCI)分析了西班牙阿利坎特省和穆尔西亚省沿海地区的时 间演变(1967-2022 年),并将其划分为四个不同的区域。共使用了 14 个沿海气象观测站,分为四个区域。使用 Mann-Kendall (MKT) 和 Theil-Sen (TSE) 测试进行了趋势分析。结果显示,夏季气候舒适度下降(-0.3 至-0.4/十年),温暖期向 6 月和 9 月初扩展,"热 "热舒适度增加了 38.7 天。夏季热舒适度的增加受到平均气温上升(0.5 至 0.7 °C/十年)、平均相对湿度下降(-1.0 至-2.1%/十年)和风速下降(-0.2 至-0.9 公里/小时/十年)的影响。在过去的 22 年(2000-2022 年)中,7 月和 9 月的气温有所下降(p ≤ 0.05)(-0.2 至-0.4/十年),首次达到 "过热 "气候舒适度临界值。最后,近年来(2000-2022 年),冬季尤其是 12 月的热舒适度有所上升。
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引用次数: 0
Flood Hazard Assessment in Australian Tropical Cyclone-Prone Regions 澳大利亚热带气旋易发地区的洪水灾害评估
Q2 Earth and Planetary Sciences Pub Date : 2023-11-13 DOI: 10.3390/cli11110229
Michael Kaspi, Yuriy Kuleshov
This study investigated tropical cyclone (TC)-induced flooding in coastal regions of Australia due to the impact of TC Debbie in 2017 utilising a differential evolution-optimised random forest to model flood susceptibility in the region of Bowen, Airlie Beach, and Mackay in North Queensland. Model performance was evaluated using a receiver operating characteristic curve, which showed an area under the curve of 0.925 and an overall accuracy score of 80%. The important flood-influencing factors (FIFs) were investigated using both feature importance scores and the SHapely Additive exPlanations method (SHAP), creating a flood hazard map of the region and a map of SHAP contributions. It was found that the elevation, slope, and normalised difference vegetation index were the most important FIFs overall. However, in some regions, the distance to the river and the stream power index dominated for a similar flood hazard susceptibility outcome. Validation using SHAP to test the physical reasoning of the model confirmed the reliability of the flood hazard map. This study shows that explainable artificial intelligence allows for improved interpretation of model predictions, assisting decision-makers in better understanding machine learning-based flood hazard assessments and ultimately aiding in mitigating adverse impacts of flooding in coastal regions affected by TCs.
本研究调查了2017年受热带气旋黛比(TC Debbie)影响,澳大利亚沿海地区发生的热带气旋(TC)引发的洪水,利用差分进化优化随机森林模拟了北昆士兰Bowen、Airlie Beach和Mackay地区的洪水易感性。采用受试者工作特征曲线评价模型性能,曲线下面积为0.925,总体准确率为80%。利用特征重要性评分和SHapely加性解释法(SHAP)对重要洪水影响因子(FIFs)进行了研究,绘制了该地区的洪水灾害图和SHAP贡献图。高程、坡度和归一化植被指数是最重要的ifs指标。然而,在一些地区,与河流的距离和河流功率指数主导了类似的洪水灾害易感性结果。利用SHAP对模型的物理推理进行验证,证实了洪水灾害图的可靠性。这项研究表明,可解释的人工智能可以改进对模型预测的解释,帮助决策者更好地理解基于机器学习的洪水灾害评估,并最终帮助减轻受tc影响的沿海地区洪水的不利影响。
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引用次数: 0
Managing Extreme Rainfall and Flooding Events: A Case Study of the 20 July 2021 Zhengzhou Flood in China 极端降雨和洪水事件的管理:以2021年7月20日中国郑州洪水为例
Q2 Earth and Planetary Sciences Pub Date : 2023-11-12 DOI: 10.3390/cli11110228
Xiaofan Zhao, Huimin Li, Qin Cai, Ye Pan, Ye Qi
On 20 July 2021, an extreme rainstorm battered Zhengzhou in China’s Henan Province, killing 302 people, including 14 individuals who drowned in a subway tunnel and 6 who drowned in a road tunnel. As the global climate warms, extreme weather events similar to the Zhengzhou flood will become more frequent, with increasingly catastrophic consequences for society. Taking a case study-based approach by focusing on the record-breaking Zhengzhou flood, this paper examines the governance capacity of inland cities in North China for managing extreme precipitation and flooding events from the perspective of the flood risk management process. Based on in-depth case analysis, our paper hypothesizes that inland cities in North China still have low risk perceptions of extreme weather events, which was manifested in insufficient pre-disaster preparation and prevention, poor risk communication, and slow emergency response. Accordingly, it is recommended that inland cities update their risk perceptions of extreme rainfall and flooding events, which are no longer low-probability, high-impact “black swans”, but turning into high-probability, high-impact “gray rhinos.” In particular, cities must make sufficient preparation for extreme weather events by revising contingency plans and strengthening their implementation, improving risk communication of meteorological warnings, and synchronizing emergency response with meteorological warnings.
2021年7月20日,一场特大暴雨袭击了中国河南省郑州市,造成302人死亡,其中14人死于地铁隧道,6人死于公路隧道。随着全球气候变暖,类似郑州洪水的极端天气事件将更加频繁,给社会带来的灾难性后果也将越来越严重。本文以郑州特大洪水为研究对象,从洪水风险管理过程的角度考察了华北内陆城市对极端降水和洪涝事件的治理能力。在深入案例分析的基础上,本文假设华北内陆城市对极端天气事件的风险认知仍然较低,表现在灾前准备和预防不足、风险沟通差、应急响应缓慢等方面。因此,建议内陆城市更新对极端降雨和洪水事件的风险认知,这些事件不再是低概率、高影响的“黑天鹅”,而是高概率、高影响的“灰犀牛”。特别是,城市必须对极端天气事件做好充分准备,修订应急计划并加强实施,改善气象预警的风险沟通,实现应急响应与气象预警同步。
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引用次数: 0
Co-Cultivation and Matching of Early- and Late-Maturing Pearl Millet Varieties to Sowing Windows Can Enhance Climate-Change Adaptation in Semi-Arid Sub-Saharan Agroecosystems 早、晚熟珍珠谷子品种与播窗配种可提高撒哈拉以南半干旱地区农业生态系统对气候变化的适应性
Q2 Earth and Planetary Sciences Pub Date : 2023-11-10 DOI: 10.3390/cli11110227
Simon Kamwele Awala, Kudakwashe Hove, Johanna Shekupe Valombola, Helena Nalitende Nafuka, Evans Kamwi Simasiku, Barthlomew Chataika, Lydia Ndinelao Horn, Simon Angombe, Levi S. M. Akundabweni, Osmund D. Mwandemele
In semi-arid regions, climate change has affected crop growing season length and sowing time, potentially causing low yield of the rainfed staple crop pearl millet (Pennisetum glaucum L.) and food insecurity among smallholder farmers. In this study, we used 1994–2023 rainfall data from Namibia’s semi-arid North-Central Region (NCR), receiving November–April summer rainfall, to analyze rainfall patterns and trends and their implications on the growing season to propose climate adaptation options for the region. The results revealed high annual and monthly rainfall variabilities, with nonsignificant negative trends for November–February rainfalls, implying a shortening growing season. Furthermore, we determined the effects of sowing date on grain yields of the early-maturing Okashana-2 and local landrace Kantana pearl millet varieties and the optimal sowing window for the region, using data from a two-year split-plot field experiment conducted at the University of Namibia—Ogongo Campus, NCR, during the rainy season. Cubic polynomial regression models were applied to grain-yield data sets to predict grain production for any sowing date between January and March. Both varieties produced the highest grain yields under January sowings, with Kantana exhibiting a higher yield potential than Okashana-2. Kantana, sown by 14 January, had a yield advantage of up to 36% over Okashana-2, but its yield gradually reduced with delays in sowing. Okashana-2 exhibited higher yield stability across January sowings, surpassing Kantana’s yields by up to 9.4% following the 14 January sowing. We determined the pearl millet optimal sowing window for the NCR to be from 1–7 and 1–21 January for Kantana and Okashana-2, respectively. These results suggest that co-cultivation of early and late pearl millet varieties and growing early-maturing varieties under delayed seasons could stabilize grain production in northern Namibia and enhance farmers’ climate adaptation. Policymakers for semi-arid agricultural regions could utilize this information to adjust local seed systems and extension strategies.
在半干旱地区,气候变化影响了作物的生长季节长度和播种时间,可能造成雨养主食珍珠粟(Pennisetum glaucum L.)的低产量和小农的粮食不安全。在这项研究中,我们使用1994-2023年纳米比亚半干旱中北部地区(NCR)的降雨数据,接收11月至4月的夏季降雨,分析降雨模式和趋势及其对生长季节的影响,为该地区提出气候适应方案。结果显示,年降水量和月降水量变化较大,11月至2月降水量呈不显著的负变化趋势,表明生长期缩短。此外,我们利用在纳米比亚大学奥贡戈校区进行的为期两年的雨季分块田间试验数据,确定了播种日期对早熟Okashana-2和地方地方品种Kantana珍珠谷子产量的影响,以及该地区的最佳播种窗口。将三次多项式回归模型应用于粮食产量数据集,预测1 - 3月任意播种日期的粮食产量。这两个品种在1月播种时的产量最高,其中kantanana表现出比okasasana -2更高的产量潜力。1月14日播种的Kantana比Okashana-2的产量优势高达36%,但随着播种的延迟,其产量逐渐降低。okasana -2在1月播种期间表现出更高的产量稳定性,在1月14日播种后,其产量超过kantanana的产量高达9.4%。我们确定了珍珠粟NCR的最佳播期分别为1月1-7日和1月1-21日,分别为Kantana和Okashana-2。上述结果表明,在纳米比亚北部地区,早、晚珍珠谷子品种的混作和晚熟品种的种植可以稳定粮食生产,提高农民的气候适应能力。半干旱农业区的决策者可以利用这些信息调整当地的种子系统和推广策略。
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引用次数: 0
A GIS-Based Assessment of Flood Hazard through Track Records over the 1886–2022 Period in Greece 基于gis的希腊1886-2022年洪水灾害跟踪记录评估
Q2 Earth and Planetary Sciences Pub Date : 2023-11-08 DOI: 10.3390/cli11110226
Niki Evelpidou, Constantinos Cartalis, Anna Karkani, Giannis Saitis, Kostas Philippopoulos, Evangelos Spyrou
This paper addresses the riverine flood events that have occurred in Greece over the last 136 years (i.e., during the 1886–2022 period), focusing, amongst others, on the case of urban floods. The flood record of various sites of the country has been collected and analyzed to determine their spatial and temporal distribution. Greece is a country where flood data and records are very scarce. Therefore, as there is not an integrated catalog of Greek floods spanning from the 19th century to recently, this is the first attempt to create an integrated catalog for Greece. The sources used include published papers, local and regional newspapers and public bodies (mainly the Ministry of Environment and Energy and the official websites of Greek municipalities). Additionally, the main factors responsible for their occurrence have been issued, regarding the country’s climatic, geological and geomorphological setting, as well as human interventions. In addition, the atmospheric circulation driving factors of floods are assessed via an unsupervised neural network approach (i.e., Self-Organizing Maps). Based on the results of this research, an online GIS-based database has been created, depicting the areas that have been struck by riverine floods in Greece. By clicking a flood event in the online database, one can view several characteristics, depending on data availability, such as duration and height of the rainfall that caused them and number of fatalities. Long-term trends of mean and extremes seasonal precipitation also linked to the spatial distribution of floods. Our analysis shows that urban floods are a very large portion of the overall flood record, and they mainly occur in the two large urban centers, Athens and Thessaloniki, as well as near large rivers such as Pineios. Autumn months and mainly November are the periods with higher flood hazards, based on past records and cyclonic atmospheric circulation constitutes the principal driving factor. Our results indicate that a flood catalog at national level is of fundamental importance, as it can provide valuable statistical insights regarding seasonality, spatial distribution of floods, etc., while it can also be used by stakeholders and researchers for flood management and flood risk analysis and modelling.
本文讨论了过去136年(即1886-2022年期间)希腊发生的河流洪水事件,其中重点是城市洪水的情况。对全国各地点的洪水记录进行了收集和分析,确定了其时空分布。希腊是一个洪水数据和记录非常稀少的国家。因此,由于没有从19世纪到最近的希腊洪水的综合目录,这是第一次尝试为希腊创建一个综合目录。所使用的来源包括已发表的论文、地方和区域报纸以及公共机构(主要是环境和能源部以及希腊市政当局的官方网站)。此外,还就该国的气候、地质和地貌环境以及人为干预提出了造成这些灾害发生的主要因素。此外,通过一种无监督神经网络方法(即自组织地图)评估了大气环流对洪水的驱动因素。基于这项研究的结果,建立了一个基于gis的在线数据库,描绘了希腊遭受河流洪水袭击的地区。通过点击在线数据库中的洪水事件,人们可以根据数据的可用性查看几个特征,例如导致洪水的降雨持续时间和高度以及死亡人数。平均和极端季节降水的长期趋势也与洪水的空间分布有关。我们的分析表明,城市洪水在整个洪水记录中占很大一部分,它们主要发生在两个大城市中心,雅典和塞萨洛尼基,以及皮涅奥斯等大河附近。从历史记录看,秋季以11月为主是洪涝高发期,气旋大气环流是洪涝高发的主要驱动因素。我们的研究结果表明,国家层面的洪水目录至关重要,因为它可以提供有关洪水季节性、空间分布等有价值的统计见解,同时也可以被利益相关者和研究人员用于洪水管理和洪水风险分析和建模。
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引用次数: 0
Examining the Spatiotemporal Changes in the Annual, Seasonal, and Daily Rainfall Climatology of Puerto Rico 波多黎各年、季、日降雨气候学的时空变化研究
Q2 Earth and Planetary Sciences Pub Date : 2023-11-06 DOI: 10.3390/cli11110225
José Javier Hernández Ayala, Rafael Méndez Tejeda
This study explores spatial and temporal changes in the rainfall climatology of Puerto Rico in order to identify areas where annual, seasonal or daily precipitation is increasing, decreasing, or remaining normal. Total annual, seasonal, and daily rainfall were retrieved from 23 historical rain gauges with consistent data for the 1956–2021 period. Mann–Kendall trend tests were done on the annual and seasonal rainfall series, and percentage change differences between two different climatologies (1956–1987 and 1988–2021) were calculated. Most of the stations did not exhibit statistically significant annual or seasonal trends in average rainfall. However, of the sites that did experience changes, most of them had statistically significant decreasing trends in mean precipitation. The annual, dry, and early wet season had more sites with negative trends when compared with positive trends, especially in the northwestern and southeastern region of the island. The late wet season was the only period with more sites showing statistically significant trends when compared with negative trends, specifically in the northern region of the island. Results for daily events show that extreme rainfall occurrences have generally decreased, especially in the western region of the island. When the 1955–1987 and 1988–2022 climatologies are compared, the results for annual average rainfall show two main regions with mean precipitation reductions, and those are the northwestern and southeastern areas of the island. The dry season was the only period with more areas exhibiting percentage increases in mean rainfall when the two climatologies were analyzed. The early and late wet season months exhibited similar patterns, with more areas on the island showing negative percentage decreases in average seasonal precipitation. The best predictor for the decreasing annual and seasonal trend in the northwest was a higher sea level pressure, and the variable that best explained the increasing trend in the northeast was total precipitable water.
本研究探讨了波多黎各降雨气候学的时空变化,以确定年、季节或日降水量增加、减少或保持正常的地区。从具有1956-2021年期间一致数据的23个历史雨量计中检索了年、季节和日总降雨量。对年和季节降雨序列进行了Mann-Kendall趋势检验,并计算了两种不同气候学(1956-1987年和1988-2021年)之间的百分比变化差异。大多数台站在平均降雨量方面没有统计上显著的年或季节趋势。然而,在经历变化的站点中,大多数站点的平均降水在统计上有显著的减少趋势。全年、干季和早湿季负趋势站点多于正趋势站点,尤其在岛的西北部和东南部地区。与负趋势相比,湿季后期是唯一一个有更多站点显示统计显著趋势的时期,特别是在该岛北部地区。每日事件的结果表明,极端降雨的发生普遍减少,特别是在岛的西部地区。对比1955-1987年和1988-2022年的气候变化,年平均降水量的减少主要表现在两个地区,即海南岛的西北部和东南部。当分析两种气候时,旱季是唯一一个平均降雨量百分比增加的地区较多的时期。雨季前期和后期表现出相似的模式,岛上更多地区的平均季节降水呈负百分比下降。在西北地区,较高的海平面气压能够很好地预测年和季节下降趋势,而在东北地区,总可降水量能够很好地解释年和季节上升趋势。
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引用次数: 0
Time Series Homogenization with ACMANT: Comparative Testing of Two Recent Versions in Large-Size Synthetic Temperature Datasets 用ACMANT进行时间序列均匀化:两个最新版本在大型合成温度数据集上的比较测试
Q2 Earth and Planetary Sciences Pub Date : 2023-11-06 DOI: 10.3390/cli11110224
Peter Domonkos
Homogenization of climatic time series aims to remove non-climatic biases which come from the technical changes in climate observations. The method comparison tests of the Spanish MULTITEST project (2015–2017) showed that ACMANT was likely the most accurate homogenization method available at that time, although the tested ACMANTv4 version gave suboptimal results when the test data included synchronous breaks for several time series. The technique of combined time series comparison was introduced to ACMANTv5 to better treat this specific problem. Recently performed tests confirm that ACMANTv5 adequately treats synchronous inhomogeneities, but the accuracy has slightly worsened in some other cases. The results for a known daily temperature test dataset for four U.S. regions show that the residual errors after homogenization may be larger with ACMANTv5 than with ACMANTv4. Further tests were performed to learn more about the efficiencies of ACMANTv4 and ACMANTv5 and to find solutions for the problems occurring with the new version. Planned changes in ACMANTv5 are presented in the paper along with related test results. The overall results indicate that the combined time series comparison can be kept in ACMANT, but smaller networks should be generated in the automatic networking process of the method. To improve further the homogenization methods and to obtain more reliable and more solid knowledge about their accuracies, more synthetic test datasets mimicking the true spatio-temporal structures of real climatic data are needed.
气候时间序列均一化的目的是消除由气候观测技术变化引起的非气候偏差。西班牙MULTITEST项目(2015-2017)的方法对比测试表明,ACMANT可能是当时可用的最准确的均匀化方法,尽管测试的ACMANTv4版本在测试数据包含多个时间序列的同步中断时给出了次优结果。为了更好地处理这一特定问题,ACMANTv5引入了组合时间序列比较技术。最近执行的测试证实,ACMANTv5可以充分处理同步不均匀性,但在其他一些情况下,准确性略有下降。对美国4个地区的已知日温度测试数据集的结果表明,使用ACMANTv5进行均匀化后的残差可能大于ACMANTv4。我们执行了进一步的测试,以更多地了解ACMANTv4和ACMANTv5的效率,并为新版本出现的问题找到解决方案。本文介绍了ACMANTv5的计划变更以及相关的测试结果。总体结果表明,在ACMANT中可以保持组合时间序列比较,但该方法在自动组网过程中需要生成更小的网络。为了进一步改进均一化方法,获得更可靠、更扎实的准确性知识,需要更多模拟真实气候数据真实时空结构的综合测试数据集。
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引用次数: 0
Regional to Mesoscale Influences of Climate Indices on Tornado Variability 区域到中尺度气候指数对龙卷风变率的影响
Q2 Earth and Planetary Sciences Pub Date : 2023-11-04 DOI: 10.3390/cli11110223
Cooper P. Corey, Jason C. Senkbeil
Tornadoes present an undisputable danger to communities throughout the United States. Despite this known risk, there is a limited understanding of how tornado frequency varies spatially at the mesoscale across county or city area domains. Furthermore, while previous studies have examined the relationships between various climate indices and continental or regional tornado frequency, little research has examined their influence at a smaller scale. This study examines the relationships between various climate indices and regional tornado frequency alongside the same relationships at the mesoscale in seven cities with anomalous tornado patterns. The results of a correlation analysis and generalized linear modeling show common trends between the regions and cities. The strength of the relationships varied by region, but, overall, the ENSO had the greatest influence on tornado frequency, followed in order by the PNA, AO, NAO, MJO, and PDO. However, future research is critical for understanding how the effects of climate indices on tornado frequency vary at different spatial scales, or whether other factors are responsible for the atypical tornado rates in certain cities.
龙卷风对美国各地的社区构成了无可争议的威胁。尽管存在这种已知的风险,但对龙卷风频率如何在中尺度上跨县或城市区域的空间变化的理解有限。此外,虽然以前的研究已经检查了各种气候指数与大陆或区域龙卷风频率之间的关系,但很少有研究在较小的尺度上检查它们的影响。本研究探讨了各气候指数与区域龙卷风频率的关系,并在七个异常龙卷风模式城市的中尺度上进行了相同的关系。相关分析和广义线性模型的结果显示了区域和城市之间的共同趋势。各地区的影响强度不同,但总体而言,ENSO对龙卷风频率的影响最大,其次是PNA、AO、NAO、MJO和PDO。然而,未来的研究对于理解气候指数对龙卷风频率在不同空间尺度上的影响是至关重要的,或者其他因素是否对某些城市的非典型龙卷风率负责。
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