青海哈拉湖氣候水文和冰川水文過程模擬研究
發(fā)布時間: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),同時其冰雪和凍土的儲量也很可觀,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)的響應模式存在顯著差異,由于個體系統(tǒng)的氣候水文和冰川水文過程同時受到全球和局地因子的影響。氣候及其變化的時空異質(zhì)性將在本研究中進行定量化分析。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)域是否為季風邊界也是一直以來的研究熱點。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。與其地點重要性形成對比的是,該區(qū)域沒有任何氣象站,也沒有實測的水文氣象資料。因此本文研究哈拉湖1950-2010年能量和水量平衡各組分的時空變化,模擬氣候水文和冰川水文過程,是對無資料流域的水文數(shù)學模型,最優(yōu)方法和應用方面的嘗試。本研究分為定性分析和定量分析,對哈拉湖地區(qū)能量和氣象場的代表性因子分析表明,五個因子分別為地貌特征,水汽傳輸,消融過程,降雨場和風場特征,總計能夠解釋98%的時空變率。定量分析主要基于大區(qū)域內(nèi)氣象站資料,高...
【文章頁數(shù)】:69 頁
【學位級別】: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:3817396
【文章頁數(shù)】:69 頁
【學位級別】: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:3817396
本文鏈接:http://sikaile.net/projectlw/dqwllw/3817396.html
最近更新
教材專著