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1.
2021 年冬季(2021 年12 月—2022 年2 月)大气环流特征为:北半球极涡呈多极型分布,中高纬环流呈3 波型分布。位势高度距平场显示,东亚中纬度地区处于正距平区,西伯利亚脊偏强,而东亚大槽较常年同期偏弱,冷空气活动偏少、强度偏强。我国近海出现了 8 次 8 级以上大风过程, 其中冷空气大风过程4 次,冷空气和温带气旋共同影响的大风过程3 次,冷空气和台风共同影响的大风过程1 次。我国近海未出现大范围的海雾过程。西北太平洋和南海共生成 2 个热带气旋,且均达到超强台风级,其中 2122 号台风“雷伊”是历史上 12 月在南海海域达到超强台风级的 2 个台风之一,也是历史上直接袭击南沙群岛的最强台风,还是影响南海最晚的超强台风。另外,全球其他海域共生成热带气旋14 个。我国近海出现2. 0 m 以上大浪过程的天数有56 d,约占冬季总日数的62%。冬季,我国近海海域呈明显降温趋势,北部海域的降温幅度明显大于南部海域,冬季海面温度较常年整体偏高。 相似文献
2.
2019年冬季（2019年12月—2020年2月）大气环流特征为：北半球的极涡呈偶极型分布,中高纬呈3波型分布,西风带槽脊较常年明显偏弱。位势高度距平场显示,东亚中纬度地区处于正距平区,东亚大槽强度弱,冷空气强度较常年同期偏弱,大风过程显著偏少,我国近海共出现7次明显的8级以上大风过程,冷空气和温带气旋共同影响的大风过程有2次,冷空气与热带气旋共同影响的大风过程有2次。浪高在2 m 以上的海浪过程有10次。近海出现大范围的海雾过程12次,海雾区域主要出现在渤海、渤海海峡、黄海北部和中部海域、琼州海峡及北部湾,出雾时段多集中于夜间至早晨。海面温度随时间逐渐降低,其从北到南的温度差在冬季由22 ℃加大到27 ℃。西北太平洋和南海共有1个台风生成。 相似文献
3.
2022年春季(3—5月)北半球极涡呈单极型分布,形状狭长,极涡强度与历史同期相当。北半球中高纬度西风带呈4波型分布。3月,我国北方的大部分地区及北部海域受西北气流控制;4月,东亚大槽加深,高压脊区较历史同期偏强;5月,中高纬环流调整为“两槽两脊”型。我国近海出现12次大风过程,其中冷空气大风过程4次,冷空气和温带气旋共同影响的大风过程3次,温带气旋大风过程4次,冷空气与热带气旋共同影响的大风过程1次。近海共出现10次比较明显的海雾过程,其中3月4次,4月3次,5月3次。西北太平洋和南海有2个热带气旋生成,接近常年同期平均值;全球其他海域有12个热带气旋生成,较历史同期平均值偏少5.7个。近海浪高2.0 m以上的海浪过程有12次,总日数为44 d。春季各月我国近海海面温度整体呈上升趋势,北方海域升温幅度大于南方海域。 相似文献
4.
2020年秋季(9—11月)大气环流特征表现为,北半球极涡呈单极型分布,中高纬环流呈4波型。9—11月,欧亚大陆中高纬环流经向度不断加大,冷空气势力增强。西太平洋副热带高压较历史平均偏强,热带气旋活动频繁。我国近海出现了19次8级以上大风过程,其中冷空气大风过程6次,台风大风过程4次,入海气旋大风过程1次,冷空气与热带气旋共同影响的大风过程7次,冷空气和温带气旋共同影响的大风过程1次。西北太平洋和南海共生成13个热带气旋,其中10月共有7个热带气旋生成,追平10月热带气旋生成数的历史最高纪录;全球其他海域共生成热带气旋26个。我国近海未出现2 m以上大浪过程的天数仅有12 d,约占秋季总日数的13％。秋季,我国近海海域呈明显降温过程,北部海域的降温幅度明显大于南部海域,受连续北上影响我国北部海域的热带气旋活动影响,9月黄海东部及东海东部的海面温度较气候态明显偏低。 相似文献
5.
2019年秋季（9—11月）大气环流特征为：北半球极涡呈绕极型分布,中高纬度环流呈4波型。随月份增加,欧亚大陆中高纬度环流的经向度不断加大,冷空气势力增强,但仍较历史平均偏弱。西太平洋副热带高压较历史平均偏强,热带气旋活动频繁。我国近海出现了17 次8级以上大风过程,其中冷空气大风过程有9次,热带气旋大风过程4次,冷空气与热带气旋共同影响的大风天气过程3次,冷空气和温带气旋共同影响的大风过程1次。西北太平洋和南海共生成16个热带气旋,全球其他海域生成热带气旋 27个。我国近海浪高在2 m以上的海浪过程有9次。秋季,我国近海海域海面温度逐月下降,北部海域的降温幅度明显大于南部海域。 相似文献
6.
2021年春季（3—5月）的大气环流特征为：北半球极涡为偶极型分布,极涡较常年平均值偏强,中高纬度西风带呈现4波型。3月,南下冷空气活动偏弱,月内海雾过程频发。4月,北部海域受高压影响,低层形势场稳定,冷空气活动减弱。5月,我国近海受温带气旋影响出现大风天气。春季我国近海出现了5次8级以上大风过程,其中冷空气大风过程2次,冷空气和温带气旋共同影响的大风过程1次,温带气旋影响的大风过程2次。春季共有8次海雾过程,3月3次,4月2次,5月3次。近海浪高在2 m以上的海浪过程有8次,大浪日数偏少。西北太平洋和南海共生成2个台风。我国近海的海面温度整体呈上升趋势,东部和南部海域升温明显,南部和北部海域海面温度梯度増加。 相似文献
7.
2018年秋季（9—11月）大气环流特征为：北半球极涡呈偶极型分布,中高纬度西风带呈5波型分布,且强度较夏季增强。9—10月,副热带高压位置偏西,强度偏强,热带气旋活动频繁;中高纬度西风带较为平直,槽脊活动不明显;11月,经向环流增大,冷空气势力增强。我国近海海域出现了13次8级以上的大风过程,其中6次主要是由冷空气和热带气旋共同影响造成的,冷空气大风过程有5次,热带气旋影响的大风过程有2次。我国近海浪高在2 m以上的海浪过程有10次。西北太平洋和南海共生成8个台风和1个热带低压,全球其他各大洋共有28个热带气旋,较常年偏多。海面温度整体呈下降趋势。未出现雷暴大风和大范围的海雾过程。 相似文献
8.
2021年秋季(9—11月)北半球大气环流特征为:极涡整体呈单极型,中高纬环流呈5波型分布,欧亚地区西风带环流形势季节内调整大,副热带高压(以下简称“副高”)偏强,西伸明显。秋季我国近海大风过程主要由冷空气、温带气旋和热带气旋影响造成。在12次8级以上大风过程中,冷空气影响8次,温带气旋影响6次,台风影响4次。西北太平洋和南海共生成9个台风,其中5个台风进入我国近海,在东西带状分布的副高影响下,近海台风主要活跃于南部海域;全球其他海域共命名热带气旋18个。我国出现2 m以上大浪过程的日数为74 d,约占总日数的81%,大浪过程与大风过程联系密切。秋季我国近海海面温度整体偏高,随着冷空气的逐渐活跃,北部海区和沿岸海域海面降温迅速,沿岸海面温度梯度加大,我国近海海域中,海面温度梯度最大的区域出现在东海。 相似文献
9.
2018年冬季（2018年12月—2019年2月）大气环流特征为：北半球极涡呈单极型分布,主体位于北冰洋上空偏向亚欧大陆一侧。12月,亚洲中东部中高纬环流经向度较大,利于冷空气南下;2019年1—2月,环流经向度减小,中高纬地区以纬向环流为主,冷空气势力减弱,东部及南部海区海雾过程增多。我国近海出现了17次8级以上大风过程,其中冷空气大风过程有13次,冷空气和温带气旋共同影响的大风过程有2次,冷空气与热带气旋共同影响的大风过程有1次, 温带气旋大风过程有1次。我国近海浪高在2 m以上的海浪过程有14次,2 m以上大浪的天数共计64 d。冬季共有10次比较明显的海雾过程,多在北部湾附近海域,出雾时间集中于夜间至早晨。南北海域海面温度之差为21～28 ℃,海面温度整体呈下降趋势。西北太平洋和南海有3个热带气旋活动。 相似文献
10.
2017年冬季（2017年12月—2018年2月）大气环流特征为：北半球极涡呈偶极型分布,中高纬度呈4波型。12月,亚洲中东部中高纬度环流经向度较大,有利于冷空气南下。2018年1月,西伯利亚冷高压较12月更强,冷空气自北向南影响我国近海。2月,冷空气活动减弱,有温带气旋入海并发展。我国近海出现了19次8级以上大风过程,其中冷空气大风过程14次,冷空气和温带气旋共同影响的大风过程2次,冷空气与热带气旋共同影响的大风过程1次,热带气旋大风过程2次。2 m以上的海浪过程有19次,未出现2 m以上大浪的天数仅有10 d。我国近海出现6次比较明显的海雾过程,出雾区域在北部湾附近海域,出雾时间在夜间—早晨时段。西北太平洋和南海共生成4个台风。海面温度整体呈下降趋势。 相似文献
11.
Using the International Comprehensive Ocean-Atmosphere Data Set(ICOADS) and ERA-Interim data, spatial distributions of air-sea temperature difference(ASTD) in the South China Sea(SCS) for the past 35 years are compared,and variations of spatial and temporal distributions of ASTD in this region are addressed using empirical orthogonal function decomposition and wavelet analysis methods. The results indicate that both ICOADS and ERA-Interim data can reflect actual distribution characteristics of ASTD in the SCS, but values of ASTD from the ERA-Interim data are smaller than those of the ICOADS data in the same region. In addition, the ASTD characteristics from the ERA-Interim data are not obvious inshore. A seesaw-type, north-south distribution of ASTD is dominant in the SCS; i.e., a positive peak in the south is associated with a negative peak in the north in November, and a negative peak in the south is accompanied by a positive peak in the north during April and May. Interannual ASTD variations in summer or autumn are decreasing. There is a seesaw-type distribution of ASTD between Beibu Bay and most of the SCS in summer, and the center of large values is in the Nansha Islands area in autumn. The ASTD in the SCS has a strong quasi-3a oscillation period in all seasons, and a quasi-11 a period in winter and spring. The ASTD is positively correlated with the Nio3.4 index in summer and autumn but negatively correlated in spring and winter. 相似文献
12.
Fei LIU Chen XING Jinbao LI Bin WANG Jing CHAI Chaochao GAO Gang HUANG Jian LIU Deliang CHEN 《大气科学进展》2020,37(7):663-670
正The Taal Volcano in Luzon is one of the most active and dangerous volcanoes of the Philippines. A recent eruption occurred on 12 January 2020(Fig. 1a), and this volcano is still active with the occurrence of volcanic earthquakes. The eruption has become a deep concern worldwide, not only for its damage on local society, but also for potential hazardous consequences on the Earth's climate and environment. 相似文献
13.
The moving-window correlation analysis was applied to investigate the relationship between autumn Indian Ocean Dipole (IOD) events and the synchronous autumn precipitation in Huaxi region, based on the daily precipitation, sea surface temperature (SST) and atmospheric circulation data from 1960 to 2012. The correlation curves of IOD and the early modulation of Huaxi region’s autumn precipitation indicated a mutational site appeared in the 1970s. During 1960 to 1979, when the IOD was in positive phase in autumn, the circulations changed from a “W” shape to an ”M” shape at 500 hPa in Asia middle-high latitude region. Cold flux got into the Sichuan province with Northwest flow, the positive anomaly of the water vapor flux transported from Western Pacific to Huaxi region strengthened, caused precipitation increase in east Huaxi region. During 1980 to 1999, when the IOD in autumn was positive phase, the atmospheric circulation presented a “W” shape at 500 hPa, the positive anomaly of the water vapor flux transported from Bay of Bengal to Huaxi region strengthened, caused precipitation ascend in west Huaxi region. In summary, the Indian Ocean changed from cold phase to warm phase since the 1970s, caused the instability of the inter-annual relationship between the IOD and the autumn rainfall in Huaxi region. 相似文献
14.
Various features of the atmospheric environment affect the number of migratory insects, besides their initial population. However, little is known about the impact of atmospheric low-frequency oscillation(10 to 90 days) on insect migration. A case study was conducted to ascertain the influence of low-frequency atmospheric oscillation on the immigration of brown planthopper, Nilaparvata lugens(Stl), in Hunan and Jiangxi provinces. The results showed the following:(1) The number of immigrating N. lugens from April to June of 2007 through 2016 mainly exhibited a periodic oscillation of 10 to 20 days.(2) The 10-20 d low-frequency number of immigrating N. lugens was significantly correlated with a low-frequency wind field and a geopotential height field at 850 h Pa.(3) During the peak phase of immigration, southwest or south winds served as a driving force and carried N. lugens populations northward, and when in the back of the trough and the front of the ridge, the downward airflow created a favorable condition for N. lugens to land in the study area. In conclusion, the northward migration of N. lugens was influenced by a low-frequency atmospheric circulation based on the analysis of dynamics. This study was the first research connecting atmospheric low-frequency oscillation to insect migration. 相似文献
15.
The atmospheric and oceanic conditions before the onset of EP El Ni?o and CP El Ni?o in nearly 30 years are compared and analyzed by using 850 hPa wind, 20℃ isotherm depth, sea surface temperature and the Wheeler and Hendon index. The results are as follows: In the western equatorial Pacific, the occurrence of the anomalously strong westerly winds of the EP El Ni?o is earlier than that of the CP El Ni?o. Its intensity is far stronger than that of the CP El Ni?o. Two months before the El Ni?o, the anomaly westerly winds of the EP El Ni?o have extended to the eastern Pacific region, while the westerly wind anomaly of the CP El Ni?o can only extend to the west of the dateline three months before the El Ni?o and later stay there. Unlike the EP El Ni?o, the CP El Ni?o is always associated with easterly wind anomaly in the eastern equatorial Pacific before its onset. The thermocline depth anomaly of the EP El Ni?o can significantly move eastward and deepen. In addition, we also find that the evolution of thermocline is ahead of the development of the sea surface temperature for the EP El Ni?o. The strong MJO activity of the EP El Ni?o in the western and central Pacific is earlier than that of the CP El Ni?o. Measured by the standard deviation of the zonal wind square, the intensity of MJO activity of the EP El Ni?o is significantly greater than that of the CP El Ni?o before the onset of El Ni?o. 相似文献
16.
基于最新的GTAP8 (Global Trade Analysis Project）数据库,使用投入产出法,分析了2004年到2007年全球贸易变化下南北集团贸易隐含碳变化及对全球碳排放的影响。结果显示,随着发展中国家进出口规模扩张,全球贸易隐含碳流向的重心逐渐向发展中国家转移。2004年到2007年,发达国家高端设备制造业和服务业出口以及发展中国家资源、能源密集型行业及中低端制造业出口的趋势加强,该过程的生产转移导致全球碳排放增长4.15亿t,占研究时段全球贸易隐含碳增量的63%。未来发展中国家的出口隐含碳比重还将进一步提高。贸易变化带来的南北集团隐含碳流动变化对全球应对气候变化行动的影响日益突出,发达国家对此负有重要责任。 相似文献
17.
Analysis of Atmospheric Boundary Layer Height Characteristics over the Arctic Ocean Using the Aircraft and GPS Soundings 
下载免费PDF全文
下载免费PDF全文 正ERRATUM to: Atmospheric and Oceanic Science Letters, 4(2011), 124-130 On page 126 of the printed edition (Issue 2, Volume 4), Fig. 2 was a wrong figure because the contact author made mistake giving the wrong one. The corrected edition has been updated on our website. The editorial office is sincerely sorry for any 相似文献
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《大气科学进展》2014,(6)
正AN Junling;see LI Ying et al.;(5),1221—1232AN Junling;see QU Yu et al.;(4),787-800AN Junling;see WANG Feng et al.;(6),1331-1342Ania POLOMSKA-HARLICK;see Jieshun ZHU et al.;(4),743-754Baek-Min KIM;see Seong-Joong KIM et al.;(4),863-878BAI Tao;see LI Gang et al.;(1),66-84BAO Qing;see YANG Jing et al.;(5),1147—1156BEI Naifang; 相似文献
20.
《Acta Meteorologica Sinica》2014,(6)
正Journal of Meteorological Research is an international academic journal in atmospheric sciences edited and published by Acta Meteorologica Sinica Press,sponsored by the Chinese Meteorological Society.It has been acting as a bridge of academic exchange between Chinese and foreign meteorologists and aiming at introduction of the current advancements in atmospheric sciences in China.The journal columns include Articles.Note and Correspondence,and research letters.Contributions from all over the world are welcome. 相似文献