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1.
2014年9月环流特征如下：北半球高纬地区极涡为单极型,中高纬地区呈6波型分布,西北太平洋副热带高压与常年同期相当,9月全国平均降水量为80.7 mm,比常年同期（65.3 mm）偏多23.6%;全国9月平均气温为17.1℃,较常年同期（16.6℃）偏高0.5℃。 月内共有6次强降水过程,四川盆地东北部、陕西中南部、河南等地共有113站发生极端连续降水日数事件,陕西中南部、山西西南部、河南西部和四川东北部等地共有96站发生极端连续降水量事件。月内,台风海鸥和凤凰先后登陆我国;华西地区、黄淮大部、华北西南部等地出现持续降雨过程;甘肃、陕西及河南等地前期气象干旱得到解除。 相似文献
2.
2019年9月大气环流和天气分析 总被引：1，自引：1，他引：0
2019年9月环流特征如下:北半球极涡呈单极型分布,强度偏弱;亚洲大陆中高纬为两槽一脊型;西北太平洋副热带高压明显偏西、偏强。9月全国平均降水量62.4 mm,较常年同期(65.3 mm)偏少4%;全国平均气温为17.7℃,较常年同期(16.6℃)偏高1.1℃。月内共出现了4次主要的区域性强降水过程,其中2次降水活动与台风有关。共有6个台风在西北太平洋和南海海域活动,无台风登陆我国。月内,华西秋雨南区开始偏早,影响显著;长江中下游气象干旱持续发展;江南、华南北部和华北部分地区出现高温天气;黑龙江、内蒙占等多地遭受风雹灾害;黑龙江和内蒙古部分地区遭低温冷冻灾害。 相似文献
3.
2016年9月大气环流和天气分析 总被引：2，自引：2，他引：0
2016年9月环流特征如下：北半球极涡呈单极型分布,强度偏强;欧亚大陆中高纬为两槽一脊型;西北太平洋副热带高压明显偏西偏北、强度偏强。9月全国平均降水量78.9 mm,较常年同期（65.3 mm）偏多20.8%;全国平均气温17.7℃,较常年同期（16.6℃）偏高1.1℃,为1961年以来历史同期第二高。9月主要出现了3次强降水过程,其中两次是由台风造成的强降水。月内,在西北太平洋和南海上共有7个台风生成,其中1614号台风莫兰蒂和1617号台风鲇鱼在我国登陆。台风莫兰蒂登陆福建,风雨范围广,台风鲇鱼先后登陆台湾和福建,多地持续强降水;四川、云南部分地区秋雨明显,局地灾情重;黄淮南部及湖北西北部等地的旱情有所缓解。 相似文献
4.
2017年8月大气环流和天气分析 总被引：3，自引：2，他引：1
2017年8月北半球500 hPa极涡呈单极型分布,强度强于常年同期;亚欧洲大陆中高纬为多波动;西北太平洋副热带高压位置偏西,强度接近常年略偏强。8月全国平均降水量126.6 mm,较常年同期（105.3 mm）偏多20%;全国平均气温为21.4℃,较常年同期（20.8℃）偏高0.6℃。月内共出现了8次主要的区域性强降水过程,多站日降水量超历史同期极值。8月共有5个台风在西北太平洋和南海海域活动,其中1713号台风天鸽、1714号台风帕卡4天内先后登陆珠三角。月内,我国南方地区出现大范围持续高温天气,江淮、江汉等地出现阶段性伏旱。 相似文献
5.
2022年10月大气环流的主要特征是北半球极涡呈单极型分布且较常年同期强度偏强,欧亚地区中高纬环流呈“两槽一脊”型,西太平洋副热带高压较常年位置偏西、偏北,强度偏强。10月,全国平均气温为10.8℃,较常年同期(10.6℃)偏高0.2℃;全国平均降水量为34.4 mm,比常年同期(35.6 mm)偏少3.4%。月内我国有2次暴雨天气过程,一次受高空槽、低空急流和副热带高压影响,另一次受台风尼格和高空槽影响。10月共有5个热带气旋在南海和西北太平洋活动,生成个数较常年偏多1.2个,无登陆台风(较常年偏少),其中台风桑卡、纳沙和尼格影响南海、海南岛和华南地区。长江以北气象干旱缓和,长江以南气象干旱持续。 相似文献
6.
2018年9月大气环流和天气分析 总被引：3，自引：3，他引：0
2018年9月大气环流的主要特征是：极涡呈偶极型,中高纬地区西风带为多波型分布,西太平洋副高强度较常年偏弱、位置偏西。全国平均降水量74.2 mm,较常年同期(65.3 mm)偏多14%;全国平均气温为16.7℃,较常年同期(16.6℃)偏高0.1℃。9月我国大范围的降水有3次,华南和西北地区东部等地出现强降水,局地灾情严重。9月在西北太平洋和南海共有4个台风生成,其中1822号台风山竹和1823号台风百里嘉在我国广东省登陆。月内黑龙江遭受低温冷冻灾害;华西秋雨开始偏晚,云南、四川南部、重庆和贵州南部秋雨强度总体偏强。 相似文献
7.
2015年8月大气环流和天气分析 总被引：2，自引：1，他引：1
2015年8月环流特征如下：北半球高纬地区极涡呈偏心型分布,亚洲中高纬度为两槽一脊环流形势,槽脊强度均强于常年同期;西太平洋副热带高压强度接近常年略偏强,位置偏西、偏南。8月全国平均降水量105.1 mm,接近常年同期（105.3 mm）;全国平均气温为21.1℃,较常年同期（20.8℃）偏高0.3℃,上旬,江淮及其以南地区出现大范围持续高温。月内共出现5次主要区域性暴雨过程。8月共有4个热带气旋（风力8级以上）在西北太平洋和南海活动,其中,第13号台风苏迪罗登陆我国,台风生成和登陆个数均偏少。华北、西北地区东部及内蒙古中部等地气象干旱持续发展。全国多个省（区、市）遭受风雹灾害。 相似文献
8.
2013年9月环流特征如下：极涡分裂,主体位于西半球;里海以北有阻塞形势出现,西太平洋副高强度较常年偏强、位置偏西。全国平均降水量69.3 mm,较常年同期偏多6.1%,华西部分地区秋雨明显,河南北部等地降水量不足常年20%,有中到重度气象干旱;全国平均气温16.8℃,较常年同期偏高0.2℃。9月我国的大范围强降水过程有2次,其中一次与热带气旋活动有关。9月共有8个热带气旋在南海和西北太平洋活动,较常年同期平均偏多3个,其中“天兔”是近40年来登陆粤东沿海的最强台风。全国17个省（区、市）发生风雹灾害;我国中东部出现雾霾天气。 相似文献
9.
2019年8月,北半球极涡呈单极型分布,强度偏强;亚洲大陆中高纬为两槽一脊型;西北太平洋副热带高压明显偏北,大陆高压偏强。8月全国平均降水量为110.5 mm,较常年同期(105.3 mm)偏多5.0%;全国平均气温为21.6℃,较常年同期(20.8℃)偏高0.8℃。月内共出现了5次主要的区域性强降水过程,其中3次降水活动与台风有关。8月共有6个热带气旋(风力8级以上)在西北太平洋和南海海域活动,其中"韦帕"、"利奇马"、"白鹿"共3个台风登陆我国。月内,东北及四川等地遭受暴雨洪涝灾害;长江中下游气象干旱发展;南方出现大范围持续高温天气;多省(区、市)遭受风雹袭击,部分地区受灾较重。 相似文献
10.
2014年8月大气环流和天气分析 总被引：3，自引：2，他引：1
2014年8月环流特征如下：北半球高纬地区极涡为偶极型,中高纬地区为4波型分布,西北太平洋副热带高压异常偏南偏强,8月全国平均降水量为104．4 mm,比常年同期（105．3 mm）略偏少0．9％。;8月全国平均气温为20．6℃,较常年同期（20．8℃）偏低0．2℃。月内共有8次强降水过程,多站出现了极端日降水量。1949年以来首次在西北太平洋和南海8月无台风生成,只有一个从东太平洋移入的1314号台风吉纳维芙。8月在长江中下游地区出现了低温寡照天气。 相似文献
11.
The spatial and temporal variations of daily maximum temperature(Tmax), daily minimum temperature(Tmin), daily maximum precipitation(Pmax) and daily maximum wind speed(WSmax) were examined in China using Mann-Kendall test and linear regression method. The results indicated that for China as a whole, Tmax, Tmin and Pmax had significant increasing trends at rates of 0.15℃ per decade, 0.45℃ per decade and 0.58 mm per decade,respectively, while WSmax had decreased significantly at 1.18 m·s~(-1) per decade during 1959—2014. In all regions of China, Tmin increased and WSmax decreased significantly. Spatially, Tmax increased significantly at most of the stations in South China(SC), northwestern North China(NC), northeastern Northeast China(NEC), eastern Northwest China(NWC) and eastern Southwest China(SWC), and the increasing trends were significant in NC, SC, NWC and SWC on the regional average. Tmin increased significantly at most of the stations in China, with notable increase in NEC, northern and southeastern NC and northwestern and eastern NWC. Pmax showed no significant trend at most of the stations in China, and on the regional average it decreased significantly in NC but increased in SC, NWC and the mid-lower Yangtze River valley(YR). WSmax decreased significantly at the vast majority of stations in China, with remarkable decrease in northern NC, northern and central YR, central and southern SC and in parts of central NEC and western NWC. With global climate change and rapidly economic development, China has become more vulnerable to climatic extremes and meteorological disasters, so more strategies of mitigation and/or adaptation of climatic extremes,such as environmentally-friendly and low-cost energy production systems and the enhancement of engineering defense measures are necessary for government and social publics. 相似文献
12.
Observed daily precipitation data from the National Meteorological Observatory in Hainan province and daily data from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis-2 dataset from 1981 to 2014 are used to analyze the relationship between Hainan extreme heavy rainfall processes in autumn (referred to as EHRPs) and 10–30 d low-frequency circulation. Based on the key low-frequency signals and the NCEP Climate Forecast System Version 2 (CFSv2) model forecasting products, a dynamical-statistical method is established for the extended-range forecast of EHRPs. The results suggest that EHRPs have a close relationship with the 10–30 d low-frequency oscillation of 850 hPa zonal wind over Hainan Island and to its north, and that they basically occur during the trough phase of the low-frequency oscillation of zonal wind. The latitudinal propagation of the low-frequency wave train in the middle-high latitudes and the meridional propagation of the low-frequency wave train along the coast of East Asia contribute to the ‘north high (cold), south low (warm)’ pattern near Hainan Island, which results in the zonal wind over Hainan Island and to its north reaching its trough, consequently leading to EHRPs. Considering the link between low-frequency circulation and EHRPs, a low-frequency wave train index (LWTI) is defined and adopted to forecast EHRPs by using NCEP CFSv2 forecasting products. EHRPs are predicted to occur during peak phases of LWTI with value larger than 1 for three or more consecutive forecast days. Hindcast experiments for EHRPs in 2015–2016 indicate that EHRPs can be predicted 8–24 d in advance, with an average period of validity of 16.7 d. 相似文献
13.
Based on the measurements obtained at 64 national meteorological stations in the Beijing–Tianjin–Hebei (BTH) region between 1970 and 2013, the potential evapotranspiration (ET0) in this region was estimated using the Penman–Monteith equation and its sensitivity to maximum temperature (Tmax), minimum temperature (Tmin), wind speed (Vw), net radiation (Rn) and water vapor pressure (Pwv) was analyzed, respectively. The results are shown as follows. (1) The climatic elements in the BTH region underwent significant changes in the study period. Vw and Rn decreased significantly, whereas Tmin, Tmax and Pwv increased considerably. (2) In the BTH region, ET0 also exhibited a significant decreasing trend, and the sensitivity of ET0 to the climatic elements exhibited seasonal characteristics. Of all the climatic elements, ET0 was most sensitive to Pwv in the fall and winter and Rn in the spring and summer. On the annual scale, ET0 was most sensitive to Pwv, followed by Rn, Vw, Tmax and Tmin. In addition, the sensitivity coefficient of ET0 with respect to Pwv had a negative value for all the areas, indicating that increases in Pwv can prevent ET0 from increasing. (3) The sensitivity of ET0 to Tmin and Tmax was significantly lower than its sensitivity to other climatic elements. However, increases in temperature can lead to changes in Pwv and Rn. The temperature should be considered the key intrinsic climatic element that has caused the "evaporation paradox" phenomenon in the BTH region. 相似文献
14.
Storms that occur at the Bay of Bengal (BoB) are of a bimodal pattern, which is different from that of the other sea areas. By using the NCEP, SST and JTWC data, the causes of the bimodal pattern storm activity of the BoB are diagnosed and analyzed in this paper. The result shows that the seasonal variation of general atmosphere circulation in East Asia has a regulating and controlling impact on the BoB storm activity, and the “bimodal period” of the storm activity corresponds exactly to the seasonal conversion period of atmospheric circulation. The minor wind speed of shear spring and autumn contributed to the storm, which was a crucial factor for the generation and occurrence of the “bimodal pattern” storm activity in the BoB. The analysis on sea surface temperature (SST) shows that the SSTs of all the year around in the BoB area meet the conditions required for the generation of tropical cyclones (TCs). However, the SSTs in the central area of the bay are higher than that of the surrounding areas in spring and autumn, which facilitates the occurrence of a “two-peak” storm activity pattern. The genesis potential index (GPI) quantifies and reflects the environmental conditions for the generation of the BoB storms. For GPI, the intense low-level vortex disturbance in the troposphere and high-humidity atmosphere are the sufficient conditions for storms, while large maximum wind velocity of the ground vortex radius and small vertical wind shear are the necessary conditions of storms. 相似文献
15.
Yuepeng PAN Mengna GU Yuexin HE Dianming WU Chunyan LIU Linlin SONG Shili TIAN Xuemei Lü Yang SUN Tao SONG Wendell W. WALTERS Xuejun LIU Nicholas A. MARTIN Qianqian ZHANG Yunting FANG Valerio FERRACCI Yuesi WANG 《大气科学进展》2020,37(9):933-938
正While China’s Air Pollution Prevention and Control Action Plan on particulate matter since 2013 has reduced sulfate significantly, aerosol ammonium nitrate remains high in East China. As the high nitrate abundances are strongly linked with ammonia, reducing ammonia emissions is becoming increasingly important to improve the air quality of China. Although satellite data provide evidence of substantial increases in atmospheric ammonia concentrations over major agricultural regions, long-term surface observation of ammonia concentrations are sparse. In addition, there is still no consensus on 相似文献
16.
《大气和海洋科学快报》2013,(1):67
正AIMS AND SCOPE Atmospheric and Oceanic Science Letters (AOSL) publishes short research letters on all disciplines of the atmosphere sciences and physical oceanography. Contributions from all over the world are welcome.SUBMISSIONAll submitted 相似文献
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<正>With the support of specialized funds for national science institutions,the Guangzhou Institute of Tropical and Marine Meteorology,China Meteorological Administration set up in October 2008 an experiment base for marine meteorology and a number of observation systems for the coastal boundary layer,air-sea flux,marine environmental elements,and basic meteorological elements at Bohe town,Maoming city,Guangdong province,in the northern part of the South China Sea. 相似文献
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《大气和海洋科学快报》2014,7(6):F0003-F0003
AIMS AND SCOPE
Atmospheric and Oceanic Science Letters （AOSL） publishes short research letters on all disciplines of the atmosphere sciences and physical oceanography. Contributions from all over the world are welcome. 相似文献
Atmospheric and Oceanic Science Letters （AOSL） publishes short research letters on all disciplines of the atmosphere sciences and physical oceanography. Contributions from all over the world are welcome. 相似文献
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《大气和海洋科学快报》2014,(5):F0003-F0003
AIMS AND SCOPE Atmospheric and Oceanic Science Letters （AOSL） pub- lishes short research letters on all disciplines of the atmos- phere sciences and physical oceanography. Contributions from all over the world are welcome. 相似文献