摘要
基于MODIS(Moderate-resolution Imagine Spectroradiometer)蒸散产品MOD16、归一化植被指数NDVI(Normalized Difference Vegetation Index)和河南省17个气象站点数据资料,运用线性趋势、相关分析和克里金插值等方法对河南省2001—2019年蒸散量时空变化特征、不同土地利用类型蒸散量差异及其影响因素进行了分析.结果表明:①2001—2019年河南省多年平均蒸散量为364.05 mm,空间上呈西南部伏牛山—桐柏山—大别山等山区较高,南阳盆地和中北部地区较低的分布特征.②河南省年内各月间的蒸散量呈“增加—减少—增加—减少”的“双峰型”分布特征,具有明显的季节差异,蒸散量从大到小依次为夏季(162.59 mm)、春季(113.47 mm)、秋季(66.47 mm)、冬季(35.79 mm).③河南省蒸散量空间分布受土地利用类型影响显著,蒸散量从大到小依次按林地(445.57 mm)、草地(347.87 mm)、水域(341.91 mm)、耕地(340.34 mm)、城镇用地(320.49 mm)、未利用土地(279.04 mm)的顺序递减.④近19年来,河南省蒸散量以5.968 mm/a的倾向率呈上升趋势,明显增加的区域主要分布在西南部伏牛山—桐柏山—大别山等高蒸散量地区.⑤相关分析表明,河南省蒸散量受气温和植被长势情况影响较为明显,受降水的影响较弱.
Based on the MODIS(moderate-resolution imaging spectroradiometer)evapotranspiration product MOD16,NDVI(normalized difference vegetation index)and climatic data of 17 meteorological stations from 2001 to 2019 in Henan Province,the spatial-temporalvariation characteristics of evapotranspiration,thechange characteristics of evapotranspiration under different land use types and its influencing factors were analyzed by using linear trend,correlation analysis,and Kriging interpolation methods.The results showed that,①the annual average evapotranspiration was 364.05 mm inHenan during 2001-2019,but the spatial distribution of evapotranspiration was very obviously different in different regions,generally,the evapotranspiration was higher in the southwest Funiu Mountains,Tongbai Mountains and Dabie Mountains,and lower in Nanyang Basin and the central and northern region.②The monthly evapotranspiration in Henan was characterized by a“bimodal peak”distribution pattern,and can be divided into four periods:increase,decrease,increase and decrease.Seasonal variation of evapotranspiration has been approximately unimodal,which changed obviously with season:162.59 mm in Summer,113.47 mm in spring,66.47 mm in autumn and 35.79 mm in winter.③The spatial distribution of evapotranspiration in Henan was significantly affected by land use types,the evapotranspiration decreased in the order of woodland(445.57 mm)>grassland(347.87 mm)>water area(341.91 mm)>cultivated land(340.34 mm)>urban land(320.49 mm)>unused land(279.04 mm).④In recent 19 years,the evapotranspiration inHenan showed an increasing trend with the tendency rate of 5.968 mm/a,and the areas with obvious increase were mainly distributed in the areas with high evapotranspiration such as Funiu Mountains,Tongbai Mountains and Dabie Mountains in the southwest.⑤The correlation analysis showed that the evapotranspiration in Henan was obviously affected by temperature and vegetationcoverage,but less affected by precipitation.
作者
张志高
邵亚军
郭超凡
蔡茂堂
邓童瑶
郭彦辰
郭可欣
ZHANG Zhigao;SHAO Yajun;GUO Chaofan;CAI Maotang;DENG Tongyao;GUO Yanchen;GUO Kexin(School of Resources Environment and Tourism, Anyang Normal University, Anyang Henan 455000, China;College of Geographic Sciences, Fujian Normal University, Fuzhou 350007, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China)
出处
《西南师范大学学报（自然科学版）》
CAS
2021年第9期128-135,共8页
Journal of Southwest China Normal University(Natural Science Edition)
基金
国家自然科学基金项目(41602366)
河南省高等学校青年骨干教师项目(2020GGJS188)
河南省高等学校重点科研项目(20A170001,21A170004).
关键词
蒸散发
MOD16
时空变化
NDVI
土地利用类型
河南省
evapotranspiration
MOD16
temporal and spatial variations
NDVI
land use type
Henan Province
