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Interdecadal Change in the Interannual Variation of the Western Edge of the Western North Pacific Subtropical High During Early Summer and the Influenceof Tropical Sea Surface Temperature 初夏西北太平洋副热带高压西缘年际变化及热带海温的影响
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.005
Zhang Hong-yu, Chen Rui-dan, Lan Ming
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引用次数: 2
The Application of a Meteo-hydrological Forecasting System with Rainfall Bias Correction in a Small and Medium-sized Catchment 降雨偏差校正的气象水文预报系统在中小流域的应用
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.012
Gao Yu-fang, Wu Yu-qing, Chen Yao-deng, Yu Wei, GU Tian-wei, Wu Ya-zhen
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引用次数: 0
Possible Linkage Between Tropical Indian Ocean SST Anomalies and the Date of First and Last Tropical Cyclones Landfalling in the Chinese Mainland 热带印度洋海温异常与中国大陆首次和最后一次热带气旋登陆日期的可能联系
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.006
Z. Qun, Wei Li-xin, L. min
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引用次数: 1
Seasonal Prediction for May Rainfall over Southern China Based on the NCEP CFSv2 基于NCEP CFSv2的中国南方5月降水季节预测
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.003
LI Chan-zhu, Yang Song, MO Wei-qiang, Zhang Jin-mei, Wei Wei
: In this study, we assess the prediction for May rainfall over southern China (SC) by using the NCEP CFSv2 outputs. Results show that the CFSv2 is able to depict the climatology of May rainfall and associated circulations. However, the model has a poor skill in predicting interannual variation due to its poor performance in capturing related anomalous circulations. In observation, the above-normal SC rainfall is associated with two anomalous anticyclones over the western tropical Pacific and northeastern China, respectively, with a low-pressure convergence in between. In the CFSv2, however, the anomalous circulations exhibit the patterns in response to the El Niño-Southern Oscillation (ENSO), demonstrating that the model overestimates the relationship between May SC rainfall and ENSO. Because of the onset of the South China Sea monsoon, the atmospheric circulation in May over SC is more complex, so the prediction for May SC rainfall is more challenging. In this study, we establish a dynamic-statistical forecast model for May SC rainfall based on the relationship between the interannual variation of rainfall and large-scale ocean-atmosphere variables in the CFSv2. The sea surface temperature anomalies (SSTAs) in the northeastern Pacific and the central-eastern equatorial Pacific, and the 500-hPa geopotential height anomalies over western Siberia in previous April, which exert great influence on the SC rainfall in May, are chosen as predictors. Furthermore, multiple linear regression is employed between the predictors obtained from the CFSv2 and observed May SC rainfall. Both cross validation and independent test show that the hybrid model significantly improve the model's skill in predicting the interannual variation of May SC rainfall by two months in advance.
在本研究中,我们利用NCEP CFSv2输出对中国南方5月降水进行了评估。结果表明,CFSv2能较好地描述5月降水和相关环流的气候学特征。然而,由于该模式在捕获相关异常环流方面的性能较差,其预测年际变化的能力较差。观测结果显示,此次超常的南太平洋降水分别与热带太平洋西部和中国东北部的两个异常反气旋有关,其间有低压辐合。然而,在CFSv2中,异常环流表现出对El Niño-Southern涛动(ENSO)的响应模式,表明该模式高估了5月SC降雨与ENSO之间的关系。由于南海季风的开始,5月南海上空的大气环流更加复杂,因此对5月南海降水的预测更具挑战性。本文基于降水年际变化与CFSv2大尺度海洋大气变量的关系,建立了5月SC降水的动态统计预报模型。选择东北太平洋和赤道中东部太平洋海温异常和西伯利亚西部500 hpa位势高度异常作为5月南太平洋降水的预测因子,对5月南太平洋降水有较大影响。此外,CFSv2预测因子与5月SC降水观测值之间采用多元线性回归。交叉验证和独立检验均表明,混合模型将5月SC降水的年际变化预测能力提前两个月显著提高。
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引用次数: 1
The Warming and Wetting Ecological Environment Changes over the Qinghai-Tibetan Plateau and the Driving Effect of the Asian Summer Monsoon 青藏高原增湿生态环境变化及亚洲夏季风的驱动作用
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.008
Sun Chan, X. Xiang-de, Wang Pei-juan, Yang Dian, Zhang Sheng-jun, Wan Chun-zhu, Cai Wen-yue
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引用次数: 4
Experiments with the Improved Dynamical-Statistical-Analog Ensemble Forecast Model for Landfalling Typhoon Precipitation over South China 华南登陆台风降水改进的动态-统计-模拟集合预报模式试验
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.011
MA Yun-qi, Ren Fu-min, Jia Li, Ding Chen-chen
: In recent work, three physical factors of the Dynamical-Statistical-Analog Ensemble Forecast Model for Landfalling Typhoon Precipitation (DSAEF_LTP model) have been introduced, namely, tropical cyclone (TC) track, TC landfall season, and TC intensity. In the present study, we set out to test the forecasting performance of the improved model with new similarity regions and ensemble forecast schemes added. Four experiments associated with the prediction of accumulated precipitation were conducted based on 47 landfalling TCs that occurred over South China during 2004 - 2018. The first experiment was designed as the DSAEF_LTP model with TC track, TC landfall season, and intensity (DSAEF_LTP-1). The other three experiments were based on the first experiment, but with new ensemble forecast schemes added (DSAEF_LTP-2), new similarity regions added (DSAEF_LTP-3), and both added (DSAEF_LTP-4), respectively. Results showed that, after new similarity regions added into the model (DSAEF_LTP-3), the forecasting performance of the DSAEF_LTP model for heavy rainfall (accumulated precipitation ≥ 250 mm and ≥ 100 mm) improved, and the sum of the threat score (TS250 + TS100) increased by 4.44%. Although the forecasting performance of DSAEF_LTP-2 was the same as that of DSAEF_LTP-1, the forecasting performance was significantly improved and better than that of DSAEF_LTP-3 when the new ensemble schemes and similarity regions were added simultaneously (DSAEF_LTP-4), with the TS increasing by 25.36%. Moreover, the forecasting performance of the four experiments was compared with four operational numerical weather prediction models, and the comparison indicated that the DSAEF_LTP model showed advantages in predicting heavy rainfall. Finally, some issues associated with the experimental results and future improvements of the DSAEF_LTP model were discussed.
本文介绍了登陆台风降水动态-统计-模拟集合预报模式(DSAEF_LTP模式)的三个物理因素,即热带气旋路径、登陆季节和台风强度。在本研究中,我们开始测试改进模型的预测性能,增加新的相似区域和集合预测方案。基于2004 - 2018年华南地区47个登陆tc,进行了4项与累积降水预测相关的试验。第一个实验设计为包含热带气旋路径、热带气旋登陆季节和强度(DSAEF_LTP-1)的DSAEF_LTP模型。其余3个实验均在第1个实验的基础上,分别增加了新的集合预测方案(DSAEF_LTP-2)、新的相似区域(DSAEF_LTP-3)和两者(DSAEF_LTP-4)。结果表明,在模型中加入新的相似区域(DSAEF_LTP-3)后,DSAEF_LTP模型对强降雨(累计降水量≥250 mm和≥100 mm)的预测性能得到改善,威胁评分(TS250 + TS100)的总和提高了4.44%。虽然DSAEF_LTP-2的预测性能与DSAEF_LTP-1相同,但当同时加入新的集合方案和相似区域(DSAEF_LTP-4)时,预测性能明显提高,优于DSAEF_LTP-3, TS提高了25.36%。将4个试验的预报效果与4种常用数值天气预报模式进行了比较,结果表明,DSAEF_LTP模式在预报强降水方面具有优势。最后,讨论了与实验结果相关的一些问题以及DSAEF_LTP模型的未来改进。
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引用次数: 2
PM10 Observed at a Meteorological Station in Beijing: Historical Trend and Implications 北京某气象站PM10观测的历史趋势及其意义
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.016
Nan Xue-jing, Lin Wei-li, HE Xiao-lei, Lei Yong, A. Merlone
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引用次数: 0
A Neural Network Based Single Footprint Temperature Retrieval for Atmospheric Infrared Sounder Measurements and Its Application to Study on Stratospheric Gravity Wave 基于神经网络的大气红外测深单足迹温度反演及其在平流层重力波研究中的应用
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.007
Yao Zhi-gang, Hong-Suk Jun, Cui Xing-dong, Zhao Zeng-liang, Han Zhi-gang
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引用次数: 3
Reliability of X-band Dual-polarization Phased Array Radars Through Comparison with an S-band Dual-polarization Doppler Radar x波段双极化相控阵雷达与s波段双极化多普勒雷达的可靠性比较
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.017
Zhou Xin-yu, HU Dong-ming, Zhang Yu, Li Hao-wen, Tian Cong-cong
: Based on the observations of a squall line on 11 May 2020 and stratiform precipitation on 6 June 2020 from two X-band dual-polarization phased array weather radars (DP-PAWRs) and an S-band dual-polarization Doppler weather radar (CINRAD/SA-D), the data reliability of DP-PAWR and its ability to detect the fine structures of mesoscale weather systems were assessed. After location matching, the observations of DP-PAWR and CINRAD / SA-D were compared in terms of reflectivity ( Z H ), radial velocity ( V ), differential reflectivity ( Z DR ), and specific differential phase ( K DP ). The results showed that: (1) DP-PAWR has better ability to detect mesoscale weather systems than CINRAD/SA-D; the multi-elevation-angles scanning of the RHI mode enables DP-PAWR to obtain a wider detection range in the vertical direction. (2) DP-PAWR ’ s Z H and V structures are acceptable, while its sensitivity is worse than that of CINRAD/SA-D. The Z H suffers from attenuation and the Z H area distribution is distorted around strong rainfall regions. (3) DP-PAWR ’ s Z DR is close to a normal distribution but slightly smaller than that of CINRAD/SA-D. The K DP products of DP-PAWR have much higher sensitivity, showing a better indication of precipitation. (4) DP-PAWR is capable of revealing a detailed and complete structure of the evolution of the whole storm and the characteristics of particle phase variations during the process of triggering and enhancement of a small cell in the front of a squall line, as well as the merging of the cell with the squall line, which cannot be observed by CINRAD/SA-D. With its fast volume scan feature and dual-polarization detection capability, DP-PAWR shows great potential in further understanding the development and evolution mechanisms of meso-γ-scale and microscale weather systems.
基于两台x波段双极化相控阵天气雷达(DP-PAWRs)和一台s波段双极化多普勒天气雷达(CINRAD/SA-D)对2020年5月11日飑线和2020年6月6日层状降水的观测,评估了dp - pawrr的数据可靠性及其对中尺度天气系统精细结构的探测能力。定位匹配后,比较DP- pawr和CINRAD / SA-D的反射率(Z H)、径向速度(V)、差反射率(Z DR)和比差相位(K DP)。结果表明:(1)DP-PAWR对中尺度天气系统的探测能力优于CINRAD/SA-D;RHI模式的多俯仰角扫描使DP-PAWR在垂直方向上获得更大的探测范围。(2) DP-PAWR的Z、H、V结构可以接受,但灵敏度低于CINRAD/SA-D。在强降雨区附近,Z - H衰减,Z - H面积分布扭曲。(3) DP-PAWR的Z DR接近正态分布,但略小于CINRAD/SA-D。DP- pawr的kdp产物具有较高的灵敏度,对降水的指示性较好。(4) DP-PAWR能够详细完整地揭示整个风暴的演变结构和飑线前部小单体的触发、增强以及与飑线合并过程中的粒子相位变化特征,这是CINRAD/SA-D无法观测到的。DP-PAWR具有快速的体积扫描特性和双极化探测能力,在进一步了解中γ尺度和微尺度天气系统的发展演变机制方面具有很大的潜力。
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引用次数: 1
Simulated Influence of Mountainous Wind Farms Operations on Local Climate 山地风电场运行对当地气候的模拟影响
IF 1.2 4区 地球科学 Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.46267/j.1006-8775.2022.009
Ai Ze, He Fei, Chen Zheng-hong, Zhong Shui-xin, Shen Yan-bo
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引用次数: 0
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热带气象学报
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