地球信息科学学报 ›› 2016, Vol. 18 ›› Issue (6): 833-846.doi: 10.3724/SP.J.1047.2016.00833
郝贵斌1,2(), 吴波1, 张立福2,*(
), 付东杰2, 李瑶2
收稿日期:
2015-07-09
修回日期:
2015-09-18
出版日期:
2016-06-10
发布日期:
2016-06-10
作者简介:
作者简介:郝贵斌(1990-),男,硕士生,研究方向为时空数据融合与长时间序列分析。E-mail:
基金资助:
HAO Guibin1,2(), WU Bo1, ZHANG Lifu2,*(
), FU Dongjie2, LI Yao2
Received:
2015-07-09
Revised:
2015-09-18
Online:
2016-06-10
Published:
2016-06-10
Contact:
ZHANG Lifu
摘要:
湖泊(特别是内陆湖)作为全球气候变化的敏感区域,是气候变化与环境变异的指示器,其面积变化在一定程度上可反映区域的气候变化。因此,精确监测湖泊面积的时空变化,对分析区域生态环境变化具有重要的意义。本文基于ESTARFM时空数据融合模型,利用MODIS数据模拟了2000年后无法得到的Landsat数据;利用NDWI和MNDWI 2种水体指数并辅以DEM数据分析了1976-2014年西藏色林错湖湖面面积的时空变化;综合湖区周围6个气象站点的气象数据(1970-2014年),探究了湖面面积变化的原因及其对气候变化的响应。结果表明:(1)利用ESTARFM时空融合模型得到的Landsat-Like数据与真实的Landsat数据在水体信息提取方面具有较高的相关性,R2可达0.93,时空数据融合的结果可用于湖泊水体的信息提取;(2)近40年来(1976-2014年),色林错湖处于持续扩张状态,面积呈较显著的增长趋势,增加了近711.652 km2,增幅为42.36%,年平均增长速率约为18.728 km2a-1,增长最快时可达55.954 km2a-1;湖面面积变化先后经历了平稳变化-迅速变化-平稳变化3个阶段;北部湖区在40年间变化最为明显,向北扩展了约22.812 km;2003-2005年,南部湖区已与雅根错湖连为一体,随后二者共同扩张;(3)气温的持续升高造成的冰雪融水补给增加可能是导致湖泊面积扩张的主要因素,风速的降低为次要因素,湖面的面积变化与降水量、日照时数的变化相关性不明显。
郝贵斌, 吴波, 张立福, 付东杰, 李瑶. ESTARFM模型在西藏色林错湖面积时空变化中的应用分析(1976-2014年)[J]. 地球信息科学学报, 2016, 18(6): 833-846.DOI:10.3724/SP.J.1047.2016.00833
HAO Guibin,WU Bo,ZHANG Lifu,FU Dongjie,LI Yao. Temporal and Spatial Variation Analysis of the Area of Siling Co Lake in Tibet Based on ESTARFM (1976-2014)[J]. Journal of Geo-information Science, 2016, 18(6): 833-846.DOI:10.3724/SP.J.1047.2016.00833
表1
现有的11月Landsat数据列表
年份 | 日期(DOY) | 传感器类型 | 行号/列号 | 空间分辨率/m |
---|---|---|---|---|
1976 | 11-13(318) | MSS | 150/38 | 60 |
1988 | 11-30(335) | TM | 139/38 | 30 |
1989 | 11-18(322) | TM | 139/38 | 30 |
1991 | 11-08(312) | TM | 139/38 | 30 |
1992 | 11-10(315) | TM | 139/38 | 30 |
1993 | 11-13(317) | TM | 139/38 | 30 |
1999 | 11-06(310) | ETM+ | 139/38 | 30 |
2000 | 11-08(313) | ETM+ | 139/38 | 30 |
2001 | 11-11(315) | ETM+ | 139/38 | 30 |
2002 | 11-30(334) | ETM+ | 139/38 | 30 |
2003 | 11-09(313) | TM | 139/38 | 30 |
2004 | 11-02(307) | TM | 139/38 | 30 |
2005 | 11-14(318) | TM | 139/38 | 30 |
2009 | 10-31(308) | TM | 139/38 | 30 |
2014 | 11-07(311) | OLI | 139/38 | 30 |
表3
Landsat数据与MODIS数据波段设置及对应关系
光谱范围 | Landsat TM波段(分辨率/m) | 波段范围/μm | MODIS波段(分辨率/m) | 波段范围/μm |
---|---|---|---|---|
可见光(蓝) | B1(30) | 0.450~0.520 | B3(500) | 0.459~0.479 |
可见光(绿) | B2(30) | 0.520~0.600 | B4(500) | 0.545~0.565 |
可见光(红) | B3(30) | 0.620~0.690 | B1(250) | 0.620~0.670 |
近红外 | B4(30) | 0.760~0.900 | B2(250) | 0.841~0.876 |
中红外 | B5(30) | 1.550~1.750 | B6(500) | 1.628~1.652 |
热红外 | B6(60) | 1.040~1.250 | B5(500) | 1.230~1.250 |
中红外 | B7(30) | 2.080~2.350 | B7(500) | 2.105~2.155 |
表4
色林错湖各年份湖泊面积统计表(km2)
年份 | Landsat面积 | MODIS面积 | 年份 | Landsat面积 | MODIS面积 |
---|---|---|---|---|---|
1976 | 1679.911 | - | 2004 | 2153.267 | 2139 |
1988 | 1753.616 | - | 2005 | 2244.368 | 2245.5 |
1989 | 1771.530 | - | 2006 | 2254.180 | 2258.5 |
1991 | 1814.634 | - | 2007 | 2275.484 | 2272 |
1992 | 1815.849 | - | 2008 | 2301.161 | 2294 |
1993 | 1821.047 | - | 2009 | 2330.384 | 2308 |
1999 | 1908.646 | - | 2010 | 2349.389 | 2336.75 |
2000 | 1948.622 | 1955 | 2011 | 2370.803 | 2370.25 |
2001 | 2014.540 | 2011.5 | 2012 | 2379.063 | 2385 |
2002 | 2063.507 | 2053.5 | 2013 | 2381.619 | 2383.75 |
2003 | 2122.813 | 2122 | 2014 | 2391.563 | 2392.75 |
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