准噶尔盆地不同土地利用类型地表反照率研究  

Surface albedos of different land use types in the Junggar Basin

作　　者：邓小进 井长青[1] 郭文章 闫豫疆 陈宸 DENG Xiaojin;JING Changqing;GUO Wenzhang;Yan Yujiang;CHEN Chen(College of Grassland and Environment Sciences,Xinjiang Agricultural University,Key Laboratory of Grassland Resources and Ecology of Xinjiang,Urumqi 830052,China;School of Economics and Busines,Xinjiang Agricultural University,Urumqi 830052,China)

机构地区：[1]新疆农业大学草业与环境科学学院,新疆草地资源与生态重点实验室,乌鲁木齐830052 [2]新疆农业大学经济兴贸经济学院,乌鲁木齐830052

出　　处：《自然资源遥感》2021年第3期173-183,共11页Remote Sensing for Natural Resources

基　　金：自治区重点实验室开放课题“基于CoLM陆面模式与RS的新疆天然草地生产力估算研究”(编号:2020D04037)。

摘　　要：研究准噶尔盆地不同土地利用类型地表反照率特征,为揭示在区域尺度上不同土地利用类型对气候变化的生物地球物理机制提供科学依据。选取2000—2018年遥感反演地表反照率数据及2000年、2010年和2018年3期土地利用数据,运用统计学方法分析准噶尔盆地不同土地利用类型在短波(0.3~2.5μm)、近红外(0.76~3.0μm)、可见光(0.35~0.76μm)地表反照率的时空变化特征及其年际变化趋势。研究结果表明:不同土地利用类型在不同波段的地表反照率具有明显的差异特征,除了二级土地利用类型湖泊和水库坑塘外,其他一级和二级土地利用类型的地表反照率均满足近红外>短波>可见光这一特征;2010—2018年3个波段的不同土地利用类型地表反照率年际变化趋势,在整体上稍显著于2000—2010年,且在2010—2018年间短波波段的一级土地利用类型均通过了0.05的显著性检验;准噶尔盆地18 a来土地利用类型地表反照率年际变化速率呈微弱的增长趋势,年际速率变化较小,整体保持稳定。研究结果将为研究区地表分光辐射及能量平衡研究奠定基础。This study focuses on the surface albedo characteristics of different land use types in the Junggar Basin,aiming to provide a scientific basis for the revealment of the biogeophysical mechanisms of different land use types on a regional scale.Based on the surface albedo data during 2000-2018 obtained through remote sensing inversion and the land use data of 2000,2010,and 2018,this study analyzed the temporal and spatial variation characteristics and interannual variation trend of the surface albedos for short wave(0.3-2.5μm),near infrared(0.76-3.0μm)and visible light(0.35-0.76μm)of different land use types in the Junggar Basin.It will provide a scientific basis for the understanding of the albedo characteristics of different land use types and reveal the impacts of cover change on climate change on a regional scale.The results are as follows.The surface albedos of different land use types have distinctly different characteristics for different wavebands.The surface albedos of the first-and second-level land use types are in the order of near infrared>short wave>visible light,except for the second-level land use types of lakes and reservoirs.For the interannual change trend,the surface albedos of different land use types for the three bands during 2010-2018 are slightly higher than that during 2000-2010.Moreover,all the first-level land use types in the short waveband during 2010—2018 passed the significance test of p=0.05.The interannual variations of surface albedos of land use types in the Junggar Basin over the past 18 years showed a weak growth trend in terms of the variation rate and were slight and stable on the whole in terms of the rate variation.The results of this study will lay a foundation for the research into the surface spectral radiation and energy balance of the study area.

关 键 词：准噶尔盆地 地表反照率 土地利用类型 可见光 近红外 短波 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]