你的位置:水利论文 >> 论文 >> 江苏省 >> 南京信息工程大学 >> 详细内容 在线投稿

极涡的活动特征与数值模拟及其对我国气候的影响 【作者】张恒德 【导师】陆维松; 高…

热度74票 浏览88次 【共7条评论】【我要评论 时间:2005年7月01日 22:36
水利论文 Ue$B\y{G2Ge

极涡的活动特征数值模拟及其对我国气候的影响

|9s!_7k#[*g8U2[0

{"d{*[S0【作者】张恒德导师】陆维松; 高守亭水利论文ofO,~)k6f;X4il
【作者基本信息】南京信息工程大学,气象学,2005年,博士水利论文(Fu2YT;Ngd Ci

水利论文,r u*E3Q)@


V |/WD(T*li0【中文摘要】 基于极涡在天气、气候及环境变化中的重要作用,本文通过资料分析、动力统计诊断和数值模拟研究,指出极涡的活动特征及其与阻塞高压、副热带高压、东亚季风等大气环流因子相互之间的动力统计关系;弄清极涡对我国气温、降水变化的影响;探讨海温、极冰对极涡的作用。主要结论如下:(1) 北半球及各分区极涡的面积、强度及位置有着很明显的年际及年代际变化。上世纪70年代中期之前极涡面积、强度基本为上升阶段,之后为下降阶段。极涡呈现偏心结构,极涡中心位置主要偏向亚洲大陆,偏离欧洲大陆,但有较强的偏向太平洋一侧的趋势。(2) 平流层增温期间,平流层极涡受高压挤压可能发生偏移、变形甚至崩溃,在下传平流层增温比非下传增温过程中平流层极涡的变化更剧烈;在下传或非下传的平流层爆发性增温过程中,其对流层环流场及极涡都经历了不同程度的演变,只不过下传平流层增温过程中变化更显著。(3) 极涡与副热带高压、阻塞高压及季风等其他大气环流因子配合起来共同作用于天气、气候及环境。北半球及各分区极涡因子与北半球及各分区副高因子之间基本呈显著的负相关作用。极涡与阻高通常存在负相关作用,冬季极涡与阻高指数之间的相互作用比夏季弱。极涡面积越大...更多(小),东亚夏季风越强(弱);极涡显著加强(减弱),东亚冬季风减弱(加强)。(4) 极涡对我国同期及后期气温和降水均有重要影响。极涡面积与我国气温之间以负相关为主,但不同季节、月份有差异。极涡强度与气温的负相关性弱一些,在某些月份,一些地区呈现正相关。极涡对降水的作用比稍弱一些,但对长江黄河流域及之间广大区域的作用还是显著的。(5) 太平洋海温对同期及之后北极涡的影响很强,极涡对后期太平洋海温的反馈作用也很强。各月份北极涡对太平洋海温的响应一般滞后2-8个月。影响极涡的海温关键区一般位于Nino区。(6) CAM可以用来对极涡进行模拟研究。通过模拟试验可知极涡对赤道东太平洋海温及极冰浓度很敏感,当给一个赤道东太平洋海温负(正)强迫,极涡的面积、强度均增大(减小);当采用极冰浓度正(负)强迫,年平均极涡的面积指数下降(上升),强度指数上升(下降)。  还原

2{1z,@s#^ }s0

3u G P%wN!Fau"}-D0【英文摘要】 Aimed at the important impact of polar vortex on weather, climate and environment, we studied deeply polar vortex by virtue of dada analysis, dynamical statistic diagnoses and numerical simulation. We pointed out the characteristics of polar vortex, and its relation to the subtropical high, blocking, Asian monsoon, made clear the effect of polar vortex on air temperature and rainfall in china, and explored the influence of the Pacific SST and Arctic sea ice to polar vortex. The main results show as following:(1) There is obvious inter-annual and inter-decadal variation for polar vortex, including the variation of area, intensity and location. Before middle age of 1970s, area and intensity index of northern polar vortex trend to rise, with small fluctuating, and after that, with clear undulating, it trend to minish. The center of northern polar vortex is not at Arctic pole. The center of polar vortex mainly displace towards Asia, departure form Europe, but stronger trend to the Pacific....更多(2) During the stratospheric warming events, pinched by anticyclone from middle latitude, stratospheric polar vortex will displace, distort or breakdown. By contrast, the change of stratospheric polar vortex is greater in the course of downward-propagating type than downward-propagating warming event: Also, troposphere circulation and polar vortex evolve in different degree, and usually both of them go with blocking, but the above evolvement in the downward-propagating warming is more distinct.(3) Polar vortex cooperate with other circulation factors, such as subtropical high, blocking, and monsoon. There are basically negative correlation between majority of polar vortex factors and main subtropical high indexes. Polar vortex and blocking usually have a negative interaction, and the interaction are more distinct in summer than in winter. When polar vortex area is larger, the Summer East Asian monsoon is stronger. If polar vortex remarkably strengthen, Winter East Asian monsoon weaken.(4) Polar vortex significantly impact the contemporaneous and subsequent air temperature and rainfall in China. The area of polar vortex mainly have a negative correlation with air temperature, while the negative relationshipbetween intensity and air temperature is not so strong. The influence of polar vortex on rainfall is weaker than on air temperature, but the effect on in the drainage area of Yangtse River and Yellow River is notable.(5) The Pacific SST observably affect contemporaneous and subsequent polar vortex, while polar vortex feed back on subsequent SST in the Pacific in great degree. The response of polar vortex to the key region SST lag 2 to 8 months, and the key region usually locate in the area of Nino.(6) The CAM is able to used in simulating polar vortex. Through experiment it is known that Polar vortex is sensible to the East Pacific SST and the Arctic sea ice. If the negative (positive) forcing of East Pacific SST is input, both area and intensity of polar vortex augment (minish). If positive (negative) forcing of the Arctic sea ice concentration, area index of annual polar vortex decline (ascend), but index of intensity ascend (decline).  还原

.pI,CK2}(a%@!h0水利论文9`^b7S}!Su

【中文关键词】 极涡; 环流因子; 气温; 降水; 数值模拟
*o#b:dv`,\/X n0【英文关键词】 polar vortex; circulation factor; air temperature; rainfall; numerical simulation
(V9^\4W F0水利论文 g"v+vI2VpM*l%j

`)g;Jz0kXc`1cI'CIo0 水利论文4o"Oh2G,R8yt5B

TAG: 导师 数值模拟 特征 张恒德 气候
顶:6 踩:12
【已经有56人表态】
8票
极差
7票
很差
9票
较差
6票
稍差
3票
稍好
9票
较好
5票
很好
9票
极好
下一篇:暴雨型滑坡灾害形成机理及预测方法研究 【作者】魏丽 【导师】郑有飞
上一篇:青藏高原正涡度源的形成及其对中国东部梅雨的影响 【作者】王慧 【导师】陈联寿
水利论文安徽省电信网友 [nypd1doi] ip: 117.68.*.*
2017-04-05 18:50:46
You will find there's eye-catching together with <a href="http://www.scarpescontioutletit.it/nike-roshe-run-saldi/nike-roshe-two-leather.html">nike roshe two pelle</a>  wide range of <a href="http://www.scarpescontioutletit.it/nike-air-max/nike-air-max-classic-bw.html">nike air max classic bw uomo</a>  eye darkness grains available today including the lotion colors, Evangeline lily,nike roshe two pelle, and additionally shimmering dustings.The truth is that,nike air max <a href="http://www.scarpescontioutletit.it/">nike roshe run scontate</a>  classic bw uomo, if a top producing agent was customer centric vs.
水利论文安徽省电信网友 [dlsf08ec] ip: 117.68.*.*
2017-04-05 19:33:13
Dont write it in a <a href="http://www.thewarriorsofficial.com/Authentic-Kevin-Durant-Warriors-Jersey/"> Authentic Kevin Durant Jersey</a>  minute manner because its <a href="http://www.thewarriorsofficial.com/Authentic-Kevon-Looney-Warriors-Jersey/"> Authentic Kevon Looney Jersey</a>  really inconvenient.In Falstaff's Big Gamble, a Shakespearean spoof, one of the main characters, Hamlet, has such a flaw.  Authentic Kevin Durant Jersey .I've bo <a href="http://www.thewarriorsofficial.com/"> Golden State Warriors Jerseys</a> ught this system recently and let me show you what I've found out about this 108 page book.  A
水利论文IANA网友 [k0ey9cko] ip: 114.97.*.*
2017-07-25 07:04:35
Whe <a href="http://www.shopthepelicansonline.com/womens-solomon-hill-basketball-jersey/">Pelicans Solomon Hill Jersey</a> n you have a subject about drib <a href="http://www.shopthepelicansonline.com/womens-buddy-hield-basketball-jersey/">Pelicans Buddy Hield Jersey</a> bling, ask your coach or another teammate Pelicans Solomon Hill Jersey for assistance. They can help you figure out what you are doing that works, and what you might want to change abo <a href="http://www.shopthepelicansonline.com/womens-langston-galloway-basketball-jersey/">Langston Galloway Jersey</a> ut how you dress. Use them to create your own personal style. Thankfully, we have
水利论文安徽省合肥市电信网友 [dlsf08ec] ip: 60.168.*.*
2017-07-25 11:47:36
Montres LonginesMontres LonginesJune 25, 2012 | Aut <a href="http://www.footballramsprostore.com/Authentic_Robert-Woods_Rams_Jersey/">Robert Woods Jersey</a> hor: fullfood | Posted in BusinessLa pi?¨ce d’ho <a href="http://www.footballramsprostore.com/Authentic_Nick-Foles_Rams_Jersey/">Rams Nick Foles Jersey</a> rlogerie Evidenza Longines Robert Woods Jersey fera appel ?? des gens des gens qui veulent une montre de forme rectangulaire qui est g??n??ralement seul un petit diff??rente, bien que de beginning tra <a href="http://www.footballramsprostore.com/Authentic_Case-Keenum_Rams_Jersey/">Case Keenum Jersey</a> d
水利论文安徽省合肥市电信网友 [nopd7roi] ip: 60.166.*.*
2017-12-22 05:34:55
But in reality,cheap air presto, suede boots are a great <a href="http://www.nikeairprestowomens.us.com/">cheap air presto</a>  luxurious alternative to the regular leather boot. People use sea <a href="http://www.nikeairprestowomens.us.com/">nike air presto ultra</a> rch engines to find web pages that deliver information of value to them. Reading the fine print when it comes to the services that you will g <a href="http://www.nikeairprestowomens.us.com/">air presto</a> et will help you avoid any misunderst
水利论文IANA网友 [dj2gyqgr4c] ip: 223.240.*.*
2018-04-21 13:26:17
83 to $4,Evan Engram Giants Jersey,446.DAMASCUS,  <a href="http://www.nflgiantsfansclub.com/Black-Friday-Evan-Engram-Jersey/">Evan Engram Giants Jersey</a> Feb. If you're able to get an autographed baseball bat from a beloved player of <a href="http://www.nflgiantsfansclub.com/Giants-Brandon-Marshall-Jersey/">Brandon Marshall Jersey</a>  the game, it'll be a big hit with any avid fan.Hens Night Idea refers to all the bars and lounges that are there to take care of the event needs of the female co <a href="http://www.nflgiantsfansclub.com/Black-Friday-Michael-Strahan-Jersey/">Womens Michael Strahan Jersey</a> mmunity.Fo
水利论文IANA网友 [dy1gyvgr3yfr] ip: 36.57.*.*
2018-06-11 08:29:50
Dancers perform Cheap  <a href="http://www.cheap-wholesalenfljerseys.com/">Cheap NFL Jerseys China</a> NFL Jerseys China at BRICS Night of Ballet in SE China's XiamenE <a href="http://www.cheap-wholesalenfljerseys.com/">Cheap China Jerseys</a> xhibition held during National Mass Innovation Entrepreneurship WeekIsraeli soldiers clash with Palestinian protesters in NablusTru <a href="http://www.cheap-wholesalenfljerseys.com/">Wholesale NFL Jerseys Free Shipping</a> mp visits Joint Base Andrews in MarylandSpecial snacks displayed during 14th ChinaA
查看全部回复【已有7位网友发表了看法】

广告投放

广告投放