青海哈拉湖氣候水文和冰川水文過(guò)程模擬研究
發(fā)布時(shí)間:2023-05-14 06:47
青藏高原擁有世界海拔最高,面積最大的湖泊系統(tǒng),同時(shí)其冰雪和凍土的儲(chǔ)量也很可觀,因此它在亞洲水文水資源利用中扮演著至關(guān)重要的角色。在過(guò)去的幾十年里全球氣候暖化的驅(qū)使下,不同冰川和湖泊系統(tǒng)的響應(yīng)模式存在顯著差異,由于個(gè)體系統(tǒng)的氣候水文和冰川水文過(guò)程同時(shí)受到全球和局地因子的影響。氣候及其變化的時(shí)空異質(zhì)性將在本研究中進(jìn)行定量化分析。哈拉湖地區(qū)(97°24’-97°47’E,38°12’-38°25’N)坐落于青藏高原東北部,該區(qū)域是否為季風(fēng)邊界也是一直以來(lái)的研究熱點(diǎn)。而高山地區(qū)的湖泊及其流域?qū)τ谌魏涡问降臍夂蚝铜h(huán)境變化的高度敏感性,也使哈拉湖地區(qū)的水文重建頗具意義。與其地點(diǎn)重要性形成對(duì)比的是,該區(qū)域沒(méi)有任何氣象站,也沒(méi)有實(shí)測(cè)的水文氣象資料。因此本文研究哈拉湖1950-2010年能量和水量平衡各組分的時(shí)空變化,模擬氣候水文和冰川水文過(guò)程,是對(duì)無(wú)資料流域的水文數(shù)學(xué)模型,最優(yōu)方法和應(yīng)用方面的嘗試。本研究分為定性分析和定量分析,對(duì)哈拉湖地區(qū)能量和氣象場(chǎng)的代表性因子分析表明,五個(gè)因子分別為地貌特征,水汽傳輸,消融過(guò)程,降雨場(chǎng)和風(fēng)場(chǎng)特征,總計(jì)能夠解釋98%的時(shí)空變率。定量分析主要基于大區(qū)域內(nèi)氣象站資料,高...
【文章頁(yè)數(shù)】:69 頁(yè)
【學(xué)位級(jí)別】:碩士
【文章目錄】:
摘要
Abstract
1 Introduction
1.1 Problem statement
1.2 Research questions and study aims
1.3 Current state of research
1.3.1 Circulation pattern
1.3.2 Climate change on the Tibetan Plateau
1.3.3 Currently available gridded datasets for the TP
1.3.4 Recent Changes in Glacial Area and Volume
1.3.5 Lake level changes
1.3.6 Hydrological modeling
2 Study area and data basis
2.1 Study area
2.2 Data basis
3 Methodology
3.1 Factor analysis at Hala Lake
3.2 Linear regression of precipitation and air temperature
3.3 Energy-balance and water-balance theory
3.3.1 Evaporation estimation
3.3.2 Glacier meltwater simulation
4 Results
4.1 Characteristics of meteorological and energy field
4.2 Reconstruction of precipitation and temperature 1950-2010
4.3 Reconstruction of evaporation 1950-2010
4.4 Glacier melt rate modeling 1950-2010
4.4.1 Characteristics of energy components
4.4.2 Enhanced glacier melt model
5 Discussion
5.1 Glaciers' response to climate change
5.2 Reconstruction of water balance 1950-2010
5.3 Deficiencies and limitation
5.4 Outlook
6 Conclusion
Acknowledgement
Appendix
Reference
本文編號(hào):3817396
【文章頁(yè)數(shù)】:69 頁(yè)
【學(xué)位級(jí)別】:碩士
【文章目錄】:
摘要
Abstract
1 Introduction
1.1 Problem statement
1.2 Research questions and study aims
1.3 Current state of research
1.3.1 Circulation pattern
1.3.2 Climate change on the Tibetan Plateau
1.3.3 Currently available gridded datasets for the TP
1.3.4 Recent Changes in Glacial Area and Volume
1.3.5 Lake level changes
1.3.6 Hydrological modeling
2 Study area and data basis
2.1 Study area
2.2 Data basis
3 Methodology
3.1 Factor analysis at Hala Lake
3.2 Linear regression of precipitation and air temperature
3.3 Energy-balance and water-balance theory
3.3.1 Evaporation estimation
3.3.2 Glacier meltwater simulation
4 Results
4.1 Characteristics of meteorological and energy field
4.2 Reconstruction of precipitation and temperature 1950-2010
4.3 Reconstruction of evaporation 1950-2010
4.4 Glacier melt rate modeling 1950-2010
4.4.1 Characteristics of energy components
4.4.2 Enhanced glacier melt model
5 Discussion
5.1 Glaciers' response to climate change
5.2 Reconstruction of water balance 1950-2010
5.3 Deficiencies and limitation
5.4 Outlook
6 Conclusion
Acknowledgement
Appendix
Reference
本文編號(hào):3817396
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