請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83259
標題: | 海洋大陸地區森林砍伐降水反應之氣候平均態相依性 Mean-states Dependence of Deforestation Induced Precipitation Changes in the Maritime Continent |
其他標題: | Mean-states Dependence of Deforestation Induced Precipitation Changes in the Maritime Continent |
作者: | 蔣濬濂 Chun-Lien Chiang |
指導教授: | 羅敏輝 Min-Hui Lo |
關鍵字: | 海洋大陸,森林砍伐,降水年際變異度,氣候平均態,溼靜能,CESM, Maritime Continent,deforestation,interannual variability of precipitation,climate mean-state,moist static energy,CESM, |
出版年 : | 2023 |
學位: | 碩士 |
摘要: | 在過往研究中,數值模擬的實驗說明了海洋大陸森林砍伐會造成降水量的顯著變化。然而,森林砍伐的氣候反應與其氣候平均態之間的關聯性仍不清楚。本研究旨在分析在大氣模式比較計畫 (AMIP) 類型的實驗以及海-陸-氣耦合氣候模式的實驗中,氣候平均態如何調節森林砍伐對氣候系統所造成的降水量反應。我們發現,相對於年代際尺度的長期氣候平均,在海洋大陸陸地區域的大氣溼靜能垂直環境擁有「負凹型」剖面(中對流層溼靜能量值低於氣候平均值,中低對流層之間溼靜能梯度的不穩定度更高)時,森林砍伐有利於更強的溼靜能局部傳送,傾向於引發更多的年降水量增加。森林砍伐所引起的降水增加也透過負回饋機制降低了海洋大陸陸地區域的年際降水變異度。相對於長期氣候平均,在更乾、更少雨的氣候狀態下,森林砍伐反而讓降水變多。透過本研究提出的機制,可以幫助推估在考慮不同氣候平均態的條件下,地表變遷所引起的地球系統反應。 Deforestation leads to significant changes in precipitation in the Maritime Continent. However, the dependence of deforestation response to the climate mean-states remains unclear. This study investigated how the climate mean-states modulate deforestation-induced precipitation anomalies by performing both Atmospheric Model Intercomparison Project–type and fully coupled climate model simulations. We discovered that the atmospheric environment over the Maritime Continent land regions, having moist static energy with a negative-concave-type vertical profile (lower mid-tropospheric MSE magnitudes related to the climate average, and higher instability in view of MSE gradient between mid- and lower-troposphere) in the mean-state, is favorable to more vigorous local energy transportation and tends to lead to higher precipitation after deforestation relative to the long-term (decadal time-scale) climatological mean. Deforestation-induced precipitation anomalies also reveal negative feedback in which deforestation can modulate interannual variability by increasing precipitation in a drier mean-state. The mechanism proposed in this study can help diagnose the responses in the Earth system caused by land-use change in consideration of different mean-states. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/83259 |
DOI: | 10.6342/NTU202300128 |
全文授權: | 同意授權(限校園內公開) |
顯示於系所單位: | 大氣科學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
U0001-0314230116259029.pdf 授權僅限NTU校內IP使用(校園外請利用VPN校外連線服務) | 1.84 MB | Adobe PDF | 檢視/開啟 |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。