圍欄封育對藏北地表熱量平衡的影響(英文)
發(fā)布時間:2025-02-05 10:42
圍欄封育是西藏政府用來保護生態(tài)環(huán)境的重要舉措之一。這項工程不僅會改變圍欄區(qū)域的植被特征,也會影響藏北地區(qū)的地表熱量平衡。關(guān)于現(xiàn)行的圍欄封育工程對當(dāng)?shù)責(zé)崃科胶庥绊懙男畔s很少,我們從當(dāng)?shù)氐霓r(nóng)牧局收集了藏北各縣圍欄的范圍坐標(biāo),將其空間數(shù)據(jù)化,并基于衛(wèi)星遙感數(shù)據(jù)和地表熱量平衡系統(tǒng)的模型計算,來探究圍欄封育后地表溫度、地表反照率和蒸散的變化情況。這些變化會影響藏北高原的地表熱量平衡和陸表溫度。研究發(fā)現(xiàn)日間和夜間的陸表溫度變化趨勢呈現(xiàn)出非對稱日變化,日間的升溫幅度大于夜間的降溫幅度;反照率的增加導(dǎo)致藏北高原吸收的短波輻射減少,引起陸表溫度降低,中部地區(qū)降溫幅度最大,達到了每10年下降0.4?0.5℃;東部地區(qū)降溫幅度最小,為每10年下降0.1?0.2℃;蒸散的減少導(dǎo)致潛熱能量輸送減少,引起的地表溫度升高最大的地區(qū)在中部地區(qū),升溫幅度大于每10年上升1℃,升溫最小的地區(qū)在西北部,升溫幅度為每10年上升0?0.1℃。
【文章頁數(shù)】:7 頁
【文章目錄】:
1 Introduction
2 Methods and datasets
2.1 Study area
2.2 Datasets
2.3 Data analysis
3 Results
3.1 Changes in the LST(Day and Night)of the fenced patches
3.2 Changes in the albedo and evapotranspiration in the fenced patches
3.3 Changes of LST caused by the absorption of shortwave radiation
3.4 Changes of LST caused by latent heat
4 Discussion
4.1 Effects of land surface characteristics on surface heat balance
4.2 Vegetation feedback to the surface heat balance
4.3 The characteristics of vegetation feedback on surface energy balance in sensitive areas
5 Conclusions
本文編號:4029710
【文章頁數(shù)】:7 頁
【文章目錄】:
1 Introduction
2 Methods and datasets
2.1 Study area
2.2 Datasets
2.3 Data analysis
3 Results
3.1 Changes in the LST(Day and Night)of the fenced patches
3.2 Changes in the albedo and evapotranspiration in the fenced patches
3.3 Changes of LST caused by the absorption of shortwave radiation
3.4 Changes of LST caused by latent heat
4 Discussion
4.1 Effects of land surface characteristics on surface heat balance
4.2 Vegetation feedback to the surface heat balance
4.3 The characteristics of vegetation feedback on surface energy balance in sensitive areas
5 Conclusions
本文編號:4029710
本文鏈接:http://sikaile.net/projectlw/qxxlw/4029710.html
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