precipitation duration 中文意思是什麼
precipitation duration
解釋
降水持續期間- precipitation : n. 1. 猛然摔下，落下。2. 猛沖；急躁，輕率，魯莽。3. 【化學】沉澱（作用）；降雨（量）；（雨、雪等的）降落。
- duration : n. 1. 持久，持續。2. 持續時間，存在時間；期間。adj. -al
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( 4 ) from computing the safety coefficient of homogeneous and heterosphere slopes, we can get useful conclusion that the safety coefficient change in the course of precipitation duration
（ 4 ）通過計算相同降雨條件對均質邊坡和成層土邊坡穩定的影響，得出安全系數隨降雨持時變化的曲線以及一些有益的結論。 -
Data used in this work are north pacific ssta, 160 stations precipitation of china, and ncep reanalysis data. main results are as follow : ( 1 ) it is found that a apparent transition of north pacific ssta in later 1970 ' s : eastern and middle - equatorial pacific ssta turns from cold to warm with area extending, and mid - latitude pacific ( west wind drift zone ) turns from warm to cold. during this transition of ssta, different characters also appear in el nino and la nina : before 1976, la nina happens more frequently, and its duration is longer, el nino zone develops from negative ssta in the early stage ; after 1976, el nino happens a little bit frequent and longer with more intensity than before, el nino zone develops from positive ssta in the early stage ; the course of ssta variation has an enso cycle of 2 - 6 years, annual oscillation of 8 - 9 years, and decadal variation of about 22 years
本文採用1950 - 1999年北太平洋海表溫度（ sst ） 、中國160站夏季降水和ncep再分析的歐亞500hpa高度場等資料，利用eof 、 svd 、小波分析、合成分析和相關分析等方法，在分析北太平洋海溫時空分佈特徵的基礎上，著重探討了海溫異常及其年代際變化對我國東部降水的影響，並對降水、高度場和海溫三者之間的關系進行了分析，以試圖尋找三者異常之間可能的聯系，主要結論如下： （ 1 ） 1976年前後，北太平洋海溫經歷了一次明顯的轉變，赤道中、東太平洋厄爾尼諾海區由冷轉暖，暖水范圍增大，中緯度西風漂流區海溫由暖轉冷；在這樣的年代際背景下，厄爾尼諾、拉尼娜事件在不同的時期也有不同的特徵：在76年前，拉尼娜事件發生頻率高，持續時間長，事件起始於負海溫距平；而76年後，則是厄爾尼諾事件發生頻率略高，持續時間長，強度增大，事件起始於正海溫距平。 -
We systemically discussed the distribution of precipitation, dynamics of soil erosion in different land - use types, the relation between soil and water losses and some rainfall characteristics, such as rainfall amount, intensity, duration and prophase rainfall. further, rainfall erosion force was discussed and regression equations between soil and water losses and rainfall characteristics were founded
較為系統的探討了閩江上游地區的降雨分佈特徵，不同土地利用方式的水土流失動態，不同土地利用方式水土流失與降雨量、降雨強度、降雨歷時、前期降雨等的關系，在此基礎上，初步探討了閩江上游的降雨侵蝕力，並建立了不同土地利用方式水土流失與降雨特性有關的回歸方程。 -
This paper proposes the indexes for the climatic division and suitability of tobacco growth in yunnan according to the regional climatic characteristics : heat resource as primary index while precipitation and sunshine duration as secondary indexes
摘要根據雲南烤煙氣候特點，提出了判別雲南烤煙氣候類型及其適宜性的指標：熱量為一級指標，降水和光照為二級指標。 -
Three passages of vapor transfer are related to the regional precipitation, especially the one carrying water from the bay of bengal. mixed cold and warm cloud portions are favorable for " catalysis - water supply ". the duration and rainfall - hit area are about half the lifecycle and rainbelt size, respectively
；降水天氣的主要水汽輸送路徑有三條，以來自孟加拉灣的西南水汽輸送帶對降水最為有利；雲系以冷暖混合雲體為主，具有發生「播撒-供應」機制有利的宏觀雲體條件；雲系降水的時段和面積一般只有雲系生命期和面積的一半。
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