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多源土壤濕度數(shù)據(jù)的比較及土壤濕度對降水的影響研究

發(fā)布時間:2019-04-19 02:07
【摘要】:利用中國區(qū)域1992-2010年的土壤濕度觀測資料,對歐洲航天局(European Space Agency)的衛(wèi)星遙感反演(以下簡稱ESA)和ERA-Interim再分析(以下簡稱ERA)的兩套土壤濕度數(shù)據(jù)在典型區(qū)域的可靠性進(jìn)行了評估。結(jié)果表明;兩種土壤濕度均能較好的描述觀測區(qū)域的總體土壤干濕變化,但均值和趨勢一致性存在時間和空間差異。ESA、ERA資料都能較好的描述中國區(qū)域春、夏、秋三個季節(jié)土壤濕度的干、濕分布格局。在干濕程度上,ESA在北方地區(qū)較觀測偏干,在江淮和西南較觀測偏濕;ERA在北方和西南地區(qū)較觀測偏濕,在江淮較觀測偏干;在江淮、華北部分區(qū)域,ERA與觀測數(shù)據(jù)的相關(guān)性要高于ESA。三個季節(jié),ESA、ERA與觀測數(shù)據(jù)都有較高的相關(guān)性,秋季時,相關(guān)性最好;在全國大部分區(qū)域,ESA偏差要小于ERA且在大部分地區(qū)都表現(xiàn)出與觀測一致的變化趨勢。在空間上,ERA在東北、華北、西南變化趨勢的空間范圍與觀測有明顯差異,變干的范圍明顯大于觀測;然而,ERA能更好的體現(xiàn)觀測土壤濕度的年際變化。相對于西部地區(qū),東部地區(qū)ERA與觀測的一致性最好,而ESA在受降水、植被、地形等因素影響較小的時段或區(qū)域與觀測的一致性最好,對秋季土壤濕度的描述比春、夏季更準(zhǔn)確。另外,我們通過利用美國氣候變率與可預(yù)測性研究計劃干旱工作組數(shù)值模式模擬的結(jié)果,探討土壤濕度對陸地降水的影響。分析了全球6個主要干旱區(qū),結(jié)果如下:北美、南美干旱區(qū)受海溫型影響最大,PcAw土壤濕度更濕,降水差值也更大,北非干旱區(qū)與之相反,PwAc土壤濕度更濕,降水差值更大,波恩比差值在北非不能代表降水的變化,澳大利亞PwAc土壤濕度更濕,降水差值卻相對PcAw要小,南非干旱區(qū)季節(jié)變化最大,也受海溫影響,卻無季節(jié)規(guī)律,中國西北干旱區(qū)除冬季外,土壤濕度差值越大,降水差值也越大。
[Abstract]:Based on the observed data of soil moisture in the China region from 1992 to 2010, The reliability of two sets of soil moisture data from European Space Agency (European Space Agency) satellite remote sensing retrieval (ESA) and ERA-Interim reanalysis (ERA) in typical regions was evaluated. The results show that; Both soil moisture and soil moisture can well describe the change of soil moisture in the observed area, but there are temporal and spatial differences in mean and trend consistency. ESA and ERA data can well describe the spring and summer in China. Dry and wet distribution pattern of soil moisture in three seasons of autumn. In the degree of dry and wet, ESA is drier than observation in northern area, wetter than observation in Jianghuai and southwest, ERA is wetter than observation in north and southwest, and drier than observation in Jianghuai. In some regions of Jianghuai and North China, the correlation between ERA and observed data is higher than that of ESA.. In the three seasons, the correlation between ESA,ERA and observed data is high, and in autumn, the correlation is the best. In most regions of China, the deviation of ESA is smaller than that of ERA, and the variation trend is consistent with observation in most areas. In space, the spatial range of the variation trend of ERA in Northeast, North China and Southwest China is obviously different from that observed, and the range of drying is obviously larger than that of observation. However, ERA can better reflect the interannual variation of observed soil moisture. Compared with the western region, the ERA of the eastern region is the best agreement with the observation, and the ESA is the best agreement with the observation in the period or region which is less affected by precipitation, vegetation, topography and so on. The description of soil moisture in autumn is more accurate than that in spring and summer, and the soil moisture in autumn is more accurate than that in spring and summer. In addition, the effects of soil moisture on land precipitation are discussed by using the numerical simulation results of the drought working Group of the Climate variability and predictability Program in the United States. Six main arid regions in the world are analyzed. The results are as follows: the arid regions of North America and South America are most affected by sea temperature type, the soil moisture of PcAw is wetter and the difference of precipitation is bigger, and the difference of precipitation is also larger in arid region of North Africa, the soil humidity of PwAc is wetter and the difference of precipitation is bigger. The Bonn ratio difference does not represent the change of precipitation in North Africa, the soil moisture of PwAc in Australia is wetter, the precipitation difference is smaller than PcAw, the seasonal variation is the largest in the arid area of South Africa, but it is also affected by SST, but there is no seasonal rule. In arid areas of northwest China, the greater the soil moisture difference is, the greater the precipitation difference is except in winter.
【學(xué)位授予單位】:成都信息工程大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:S152.71

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李昂;陸其峰;楊曉峰;張建偉;;AMSR-E衛(wèi)星反演土壤濕度與ECWMF、NECP再分析土壤濕度比較分析[J];遙感技術(shù)與應(yīng)用;2013年04期

2 盧麾;施建成;;基于遙感觀測的21世紀(jì)初中國區(qū)域地表土壤水及其變化趨勢分析[J];科學(xué)通報;2012年16期

3 李明星;馬柱國;牛國躍;;中國區(qū)域土壤濕度變化的時空特征模擬研究[J];科學(xué)通報;2011年16期

4 左志燕;張人禾;;中國東部春季土壤濕度的時空變化特征[J];中國科學(xué)(D輯:地球科學(xué));2008年11期

5 張文君;周天軍;宇如聰;;中國土壤濕度的分布與變化I.多種資料間的比較[J];大氣科學(xué);2008年03期

6 聶肅平;羅勇;朱江;;Trends and Scales of Observed Soil Moisture Variations in China[J];Advances in Atmospheric Sciences;2008年01期

7 馬柱國,黃剛,甘文強,陳明林;近代中國北方干濕變化趨勢的多時段特征[J];大氣科學(xué);2005年05期

8 孫丞虎,李維京,張祖強,何金海;淮河流域土壤濕度異常的時空分布特征及其與氣候異常關(guān)系的初步研究[J];應(yīng)用氣象學(xué)報;2005年02期

9 李新周,劉曉東,馬柱國;近百年來全球主要干旱區(qū)的干旱化特征分析[J];干旱區(qū)研究;2004年02期

10 馬柱國,符淙斌,謝力,陳文海,陶樹望;土壤濕度和氣候變化關(guān)系研究中的某些問題[J];地球科學(xué)進(jìn)展;2001年04期

相關(guān)博士學(xué)位論文 前1條

1 王國印;半干旱區(qū)陸氣相互作用的觀測與研究[D];蘭州大學(xué);2013年

相關(guān)碩士學(xué)位論文 前3條

1 武建軍;干旱半干旱區(qū)近地層能量閉合異常及不平衡特征分析[D];蘭州大學(xué);2014年

2 劉栗;中國東部春季土壤濕度的時空特征及多種再分析資料的對比[D];中國氣象科學(xué)研究院;2014年

3 陳潔;AMSR-E土壤濕度產(chǎn)品在我國西北地區(qū)的精度驗證[D];中國氣象科學(xué)研究院;2010年

,

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