天山北坡三工河流域高时空分辨率气温与地表反照率数据构建与分析
文献类型：学位论文
| 作者 | 王新新 |
| 答辩日期 | 2017-05-01 |
| 文献子类 | 硕士 |
| 授予单位 | 中国科学院大学 |
| 授予地点 | 新疆乌鲁木齐 |
| 导师 | 罗格平 |
| 关键词 | 日均气温 土地利用/土地覆被变化 地表反照率 绿洲-荒漠区 三工河流域 Daily mean air temperature Land-use and land-cover change(LUCC) Land surface albedo Oasis-desert region Sangong River Basin |
| 学位专业 | 理学硕士 |
| 英文摘要 | Currently, the spatial resolutions of available temperature datasets such as ClimaticResearch Unit(CRU) 、 The Climate Forecast System Reanalysis(CFSR) 、 ModerateResolution Imaging Spectroradiometer(MODIS) are too coarse to efficiently characterizethe difference of heterogeneous hydrothermal pattern in medium-scale oasis-desertecosystem in arid regions. Therefore, the construction of mean air temperature dataset withhigh spatial and temporal resolution is crucial for investigating ecological interactionsbetween oasis and desert ecosystems. The human-induced land-use/land-cover changes areregarded as one of the main factors in affecting surface albedo and albedo affects the nearsurface air temperature through influencing the hydrothermal circulation between the landand atmosphere. Nowadays, studing the interactions between albedo and air temperature isbecoming a hot topic in the context of global climate change. Thus, the Sangong riverbasin which comprises a typical Mountains-Oasis-Desert System is selected as the studyarea. Based on Landsat TM/OLI images、meteorological datas and land use/land coverdatas, the relative change rates of air temperature (R-Rates) for different land-covers andthe daily mean air temperature dataset were retrieved. Moreover, the albedo datas withhigh spatial resulotion in August of year 1989、1998、2004、2014 were retrieved and alsoanalysed the land cover change features during the 25 years. Then the interactions betweenalbedo and air temperature were analysed. Results show that:(1) The regression coefficient between the instantaneous air temperature and daily meanair temperature perfomed well, R2=0.96，p<0.01 and the mean RMSE=1.54℃. TheR-Rates of sandy desert, soil desert, built-up areas, cropland and hills was 1.12, 1.03, 0.97, 0.80 and 0.76, respectively, compared with reference station. Estimated dailymean air temperature and observed values in different weather stations showed asignificant linear correlation , R2>0.90, RMSE=2.34℃,p<0.05.(2) The method of retrieving albedo data had high accuration, the absolute error wassmaller than 0.05 and it agreed well with MCD43B3 datasets, R2=0.8173. Differentland-covers had different albedo, the albedo of sandy desert, hills, soil desert, built-up,cropland and water was 0.33, 0.30, 0.29, 0.27, 022 and 0.11, respectively. The spatialdifferences becomed weaker from 1989 to 2014.(3) The mean air temperature had apparent heterogeneity which caused by different landcovers. The mean air temperature of sandy desert > soil desert > built-up> cropland >hill and the mean air temperature of oasis had a high fluctuation. The main factorwhich affects the interannual difference of albedo is land-cover change and affects theannual variance is the vegetation cover condition. The mean albedo and mean airtemperature of growing season had positive correlation, R2= 0.3, p < 0.01. |
| 学科主题 | 地图学与地理信息系统 |
| 语种 | 中文 |
| 源URL | [http://ir.xjlas.org/handle/365004/14902]  |
| 专题 | 新疆生态与地理研究所_研究系统_空间对地观测与系统模拟研究室 |
| 作者单位 | 中国科学院新疆生态与地理研究所 |
| 推荐引用方式 GB/T 7714 | 王新新. 天山北坡三工河流域高时空分辨率气温与地表反照率数据构建与分析[D]. 新疆乌鲁木齐. 中国科学院大学. 2017. |
入库方式： OAI收割
来源：新疆生态与地理研究所
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