緯流指數 的英文怎麼說
中文拼音 [wěiliúzhǐshǔ]
緯流指數
英文
zonal index-
This paper use the ncep / ncar day - to - day reanalysis data of 500hpa high field and so on, choose ural mountain, baikal, okhotsk as the key district, the mid - high latitude of eurasia circulation courses that have long duration ( scale of time is middle, namely during 10 - 30 day ), maybe continue continuously after being intermittence of 1 - 2 days in middle, appear repeatedly is for research object, define an index " i " of the circulation pattern over mid - high latitude of eurasia. a method is proposed to identify the summer typical persistent circulation pattern at 500hpa levels over eurasia mid - high latitude. the climate characteristics of those typical persistent circulation patterns are studied
本文利用ncep / ncar再分析逐日500hpa高度場等資料，選擇烏拉爾山、貝加爾湖、鄂霍次克海這三個地方作為關鍵區，以夏季歐亞中高緯度持續時間長（時間尺度屬于中間時間尺度，即10 ? 30天之間） 、中間可能會間歇1 、 2天然後又繼續持續、反復出現的環流過程為研究對象，定義了一個夏季歐亞中高緯流型指數，在此基礎上提出了一種對夏季歐亞中高緯500hpa典型持續流型的界定方法，研究了典型持續流型的氣候特徵，分析了流型指數的年代際變化，以及對應不同階段、不同流型的降水場、加熱場、海溫場等的主要特徵。Especially, t - test shows that significance of the asia polar vortex, zonal circulation index, the most northern extension edge of subtropical high of northern west pacific and the warm pool of pacific ocean, are at 95 % （ 90 % ）
特別地，亞洲極渦、緯向環流指數、西太平洋副熱帶高壓北界位置及太平洋暖池的海表面溫度等因子均通過了95 % （ 90 % ）信度水平檢驗。Results show that there are two main spatial patterns of the wp ssta : one is uniform in the whole area, the other is of the north - south asymmetry. when the spatial pattern is uniform in the whole area, in the warm years, there is a anticyclone circulation existing over the warm pool and westerly in the subtropical region and easterly in the tropical region have been greatly strengthened at 850hpa, while a anticyclone circulation over the india region at 200hpa, the walker circulation has been strengthened, the summer rainfall may be above normal in the upper and middle reaches of the yangtze river, vice versa
當ssta為一致性分佈時，暖異常年， 850hpa暖池區上空為一反氣旋偏差環流，副熱帶地區西風和低緯度地區東風得到加強，長江中上游地區盛行偏南風氣流； 200hpa南亞上空為一反氣旋偏差環流，長江中上游地區為北風； walker環流加強，副熱帶高壓偏強，經向垂直環流在25 35 n附近為上升氣流，長江中上游地區降水偏多，是lanina事件的多發年，對應的soi指數偏高，冷異常年則相反。The probability distributions of climatic elements are discussed. based on the characters of them, a multimode model is introduced and verified through the nonlinear fitting. the climate features of quasi - biennial oscillation of the stratospheric zonal wind over equator, the enso index, the surface pressure at reykjavik 21 90w 64 13n and swedish temperature, and the northern hemisphere tree ring all show that the multimode are universal in the climatic system
對氣候要素的概率分佈進行了討論，根據這些概率分佈的特點提出了多模態模型，並用非線性擬合的方法進行了驗證。對赤道平流層緯向風enso指數esi序列冰島reykjavik 21 . 90w ， 64 . 13n氣壓和瑞典溫度北半球樹木年輪等數據的分析表明：氣候系統中多模態現象具有普遍性。分享友人