基于MOD16产品的科尔沁草原地表蒸散时空变化特征

doi:10.11755/j.issn.1006-7639(2021)-05-0831

干旱气象 ›› 2021, Vol. 39 ›› Issue (5): 831-837.DOI: 10.11755/j.issn.1006-7639(2021)-05-0831

基于MOD16产品的科尔沁草原地表蒸散时空变化特征

于静^1,²(),王莺¹(),高亚敏²,齐佳慧²,付铭³

1.中国气象局兰州干旱气象研究所,甘肃省干旱气候变化与减灾重点实验室,中国气象局干旱气候变化与减灾重点实验室,甘肃兰州 730020
2.内蒙古自治区通辽市气象局,内蒙古通辽 028000
3.内蒙古自治区赤峰市气象局,内蒙古赤峰 024000

收稿日期:2020-10-23 修回日期:2021-06-10 出版日期:2021-10-30 发布日期:2021-11-08
通讯作者: 王莺
作者简介:于静(1991— ),女,工程师,主要从事气候变化、陆表蒸散以及干旱监测方面的研究. E-mail: yjarhope@163.com。
基金资助:
干旱气象科学研究基金项目(IAM201909);通辽市气象局科技创新项目(202101);内蒙古自治区自然科学基金(2018MS04001);内蒙古自治区科技成果转化专项(201905)

Spatio-temporal Variation Characteristics of Surface Evapotranspiration in the Korqin Grassland Based on MOD16 Products

YU Jing^1,²(),WANG Ying¹(),GAO Yamin²,QI Jiahui²,FU Ming³

1. Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, Key Laboratory of Arid Climate Change and Reducing Disaster of China Meteorological Administration, Lanzhou 730020, China
2. Tongliao Meteorological Bureau of Inner Mongolia, Tongliao 028000, Inner Mongolia, China
3. Chifeng Meteorological Bureau of Inner Mongolia, Chifeng 024000, Inner Mongolia, China

Received:2020-10-23 Revised:2021-06-10 Online:2021-10-30 Published:2021-11-08
Contact: Ying WANG

摘要/Abstract

摘要：

草原是科尔沁地区的主体生态系统,定量研究该地区地表蒸散发对掌握科尔沁草原的生态效应具有重要意义。基于2000—2019年MOD16地表蒸散数据集和气象站点观测数据,探讨分析科尔沁草原地表蒸散的时空变化特征及其气象影响因素。结果表明:(1)MOD16地表蒸散产品在科尔沁草原地区具有较好的适用性,其地表潜在蒸散产品数据与蒸发皿实测数据的决定系数达0.9以上。(2)近20 a科尔沁草原ET与PET均呈现“先升后降”的单峰型月际分布特征,ET的年际波动较PET明显,且ET整体以28.86 mm·(10 a)^-1的速率显著增加,增加区域超过研究区的75%,而PET整体则以13.35 mm·(10 a)^-1的速率显著减小,但速率增加的区域大于减小的区域。(3)ET高值区集中在科尔沁草原西北部,PET高值区则集中在中部地区,且二者存在一定的反向空间分异特征;不同土地利用类型下地表蒸散不同,ET自林地、草地、农田依次减小,而PET则相反。(4)近20 a科尔沁草原ET分别在2003年和2011年发生由弱至强的突变,而PET则在2015年发生由强至弱的突变,且未来约20%的区域地表实际蒸散可能持续目前的变化趋势。(5)科尔沁草原ET、PET与各气象因子的相关性一致,均与降水量、日照时数呈显著正相关,而与气温、相对湿度、风速等相关性不明显。

关键词: 科尔沁草原, 地表蒸散, 时空变化特征, 气象影响因子

Abstract:

Grassland is the main ecosystem of the Korqin area, and the quantitative study of its surface evapotranspiration is of great significance to master the ecological effect of the Korqin grassland. Based on surface evapotranspiration dataset of MOD16 and meteorological observation data from 2000 to 2019, the temporal and spatial variation characteristics of surface evapotranspiration and its meteorological influencing factors in the Korqin grassland were analyzed. The results are as follows: (1) MOD16 products have good applicability in the Korqin grassland, and the determination coefficient between surface potential evapotranspiration of MOD16 products (MOD16-PET) and evaporation of evaporating pan was above 0.9. (2) The monthly distribution of MOD16-ET and MOD16-PET presented a typical single-peak pattern in the Korqin grassland, and their evapotranspiration increased at first and then decreased. The inter-annual change of MOD16-ET was obvious than MOD16-PET in the Korqin grassland from 2000 to 2019. MOD16-ET increased significantly with 28.86 mm·(10 a)^-1 rate, and the increasing area was more than 75%, while MOD16-PET decreased significantly with a rate of 13.35 mm·(10 a)^-1 as a whole, and the increasing area was greater than the reducing area. (3) The high values of ET distributed in the northwest of the Korqin grassland, while that of PET distributed in the central region, and they had a reverse spatial differentiation characteristics to some extent. The surface evapotranspiration was different under different types of land use, and ET reduced from woodland, grassland and farmland in turn, while PET was opposite. (4) The mutation of ET from weak to strong occurred in 2003 and 2011, respectively, while that of PET from strong to weak occurred in 2015 in the Korqin grassland from 2000 to 2019, and ET in about 20% region would be likely to continue the current trend in the future. (5) The correlations of ET and PET with meteorological factors were consistent, and they were significantly and positively correlated with precipitation and sunshine hours, while their correlations weren’t obvious with temperature, relative humidity and wind speed.

Key words: Korqin grassland, surface evapotranspiration, spatial and temporal variation characteristics, meteorological influencing factors

中图分类号:

P426.2

于静,王莺,高亚敏,齐佳慧,付铭. 基于MOD16产品的科尔沁草原地表蒸散时空变化特征[J]. 干旱气象, 2021, 39(5): 831-837.

YU Jing,WANG Ying,GAO Yamin,QI Jiahui,FU Ming. Spatio-temporal Variation Characteristics of Surface Evapotranspiration in the Korqin Grassland Based on MOD16 Products[J]. Journal of Arid Meteorology, 2021, 39(5): 831-837.

图/表 7

图1 研究区地形高度(阴影)及气象站点分布

Fig.1 Distribution of terrain height (shadows) and meteorological stations in study area

图2 MOD16-PET与蒸发皿蒸发量的相关性

Fig.2 Correlation between pan evaporation and MOD16-PET product

图3 2000—2019年科尔沁草原ET与PET年际(a)及逐月(b)变化

Fig.3 The inter-annual (a) and monthly (b) changes of ET and PET in the Korqin grassland from 2000 to 2019

图4 2000—2019年科尔沁草原ET(a)与PET(b)变化趋势 (空白区无值,下同)

Fig.4 Change trend of ET (a) and PET (b) in the Korqin grassland from 2000 to 2019 (the values in blank areas for nodata, the same as below)

图5 2000—2019年科尔沁草原平均ET(a)和PET(b)的Mann-Kendall检验

Fig.5 The Mann-Kendall test of average ET (a) and PET (b) in the Korqin grassland from 2000 to 2019

图6 科尔沁草原年平均ET(a)与PET(b)的空间分布(单位:mm)

Fig.6 Spatial distribution of annual average ET (a) and PET (b) in the Korqin grassland (Unit: mm)

表1 科尔沁草原地表蒸散与气象因子的相关系数

Tab.1 The correlation coefficients between surface evapotranspiration and meteorological factors in the Korqin grassland

气象因子	ET	PET
相对湿度	0.058	0.007
平均气温	0.05	0.03
降水量	0.66^*	0.32^*
日照时数	0.27^*	0.20^*
平均风速	0.03	0.01

参考文献 25

[1]	XIONG Y J, ZHAO S H, TIAN F, et al. An evapotranspiration product for arid regions based on the three-temperature model and thermal remote sensing[J]. Journal of Hydrology, 2015, 530:392-404. DOI URL
[2]	YANG Y T, GUAN H D, SHANG S H, et al. Toward the use of the MODIS ET product to estimate terrestrial GPP for nonforest ecosystems[J]. IEEE Geoscience & Remote Sensing Letters, 2014, 11(9):1624-1628.
[3]	BOUCHET R J. Évapotranspiration réele ET potentielle signification climatique[J]. International Association of Hydrological Sciences, 1963,(62):134-142.
[4]	RAMIREZ J A, HOBBINS M T, BROWN T C. Observational evidence of the complementary relationship in regional evaporation lends strong support for Bouchet’s hypojournal[J]. Geophysical Research Letters, 2005, 32:L15402. DOI: 10.1029/2005GL023549. DOI URL
[5]	李霞, 刘廷玺, 段利民, 等. 科尔沁沙地参考作物蒸散发估算及影响因子分析[J]. 水土保持研究, 2020, 27(6):153-159.
[6]	邓慧平, 刘厚风. 全球气候变化对松嫩草原水热生态因子的影响[J]. 生态学报, 2000, 20(6):958-963.
[7]	HUNTINGTON T G. Evidence for intensification of the global water cycle: Review and synjournal[J]. Journal of Hydrology, 2006, 319(1):83-95. DOI URL
[8]	夏军, 石卫, 陈俊旭, 等. 变化环境下水资源脆弱性及其适应性调控研究——以海河流域为例[J]. 水利水电技术, 2015, 46(6):27-33.
[9]	刘倩, 张方敏, 李威鹏, 等. 基于温度的参考作物蒸散量计算方法的适用性评价[J]. 气象与环境科学, 2019, 42(2):19-26.
[10]	邱新法, 曾燕, 缪启龙, 等. 用常规气象资料计算陆面年实际蒸散量[J]. 中国科学:地球科学, 2003, 33(3):281-288.
[11]	赵亚迪, 刘永和, 李建林, 等. 1960—2013年中国地表潜在蒸散发时空变化及其对气象因子的敏感性[J]. 沙漠与绿洲气象, 2018, 12(3):1-9.
[12]	邱美娟, 刘布春, 刘园, 等. 吉林省参考作物蒸散量的时空变化特征及影响因素[J]. 干旱气象, 2019, 37(1):119-126.
[13]	张荣华, 杜君平, 孙睿. 区域蒸散发遥感估算方法及验证综述[J]. 地球科学进展, 2012, 27(12):1295-1307.
[14]	高彦春, 龙笛. 遥感蒸散发模型研究进展[J]. 遥感学报, 2008, 12(3):515-528.
[15]	曲学斌, 高绍鑫, 窦华山, 等. 基于MOD16的呼伦贝尔蒸散量变化分析[J]. 沙漠与绿洲气象, 2020, 14(1):101-107.
[16]	闫俊杰, 付秀东, 赵玉, 等. 2001—2015年伊犁河谷草地蒸散发时空变化分析[J]. 水土保持研究, 2019, 26(6):184-190.
[17]	高瑜莲, 柳锦宝, 柳维扬, 等. 近14 a新疆南疆绿洲地区地表蒸散与干旱的时空变化特征研究[J]. 干旱区地理, 2019, 42(4):830-837.
[18]	佟斯琴, 张继权, 哈斯, 等. 基于MOD16的锡林郭勒草原14年蒸散发时空分布特征[J]. 中国草地学报, 2016, 38(4):83-91.
[19]	叶红, 张廷斌, 易桂花, 等. 2000-2014年黄河源区ET时空特征及其与气候因子关系[J]. 地理学报, 2018, 73(11):2117-2134. DOI
[20]	段翰晨, 王涛, 薛娴, 等. 基于RS与GIS的科尔沁沙地沙漠化时空演变[J]. 中国沙漠, 2013, 33(2):470-477.
[21]	于静, 高亚敏, 付铭. 科尔沁草原NDVI时空变化特征及其对气候的响应[J]. 中国草地学报, 2020, 42(6):82-90.
[22]	魏凤英. 现代气候统计诊断与预测技术[M]. 2版. 北京: 气象出版社, 2007:36-65.
[23]	吴拥政. 重标极差法及其应用[J]. 统计与决策, 2004(8):23-24.
[24]	陈廷芝, 尤莉, 古月. 2009年汛期内蒙古干旱少雨成因[J]. 干旱气象, 2010, 28(2):167-172.
[25]	兰州干旱气象研究所干旱监测预测研究室. 2009年夏季全国干旱状况及其影响[J]. 干旱气象, 2009, 27(3):298-303.

基于MOD16产品的科尔沁草原地表蒸散时空变化特征

Spatio-temporal Variation Characteristics of Surface Evapotranspiration in the Korqin Grassland Based on MOD16 Products

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

图/表 7

参考文献 25

相关文章 2

编辑推荐

Metrics

[1]	李万荣, 张弢. 1960—2017年河西走廊东部寒潮时空变化特征[J]. 干旱气象, 2019, 37(5): 747-753.
[2]	姚镇海, 姚叶青, 王传辉, 樊凡, 施国萍 . 1987—2016年安徽省暑期体感温度时空变化特征[J]. 干旱气象, 2019, 37(3): 454-.