引用本文: 王玮，王丽娟，孙伍红，戴昂，胡蝶，郭铌. 祁连山草地MODIS LST产品真实性检验. 欢乐牛牛, 2020, 37(12): 1-13 doi: shu

Citation: WANG W, WANG L J, SUN W H, DAI A, HU D, GUO N. Validation of MODIS land surface temperature products in grasslands of Qilian Mountain. Pratacultural Science, 2020, 37(12): 1-13 doi: shu

祁连山草地MODIS LST产品真实性检验

王玮 ^1, ,
王丽娟 ^{1,
,} ,
孙伍红 ^2, ,
戴昂 ^3, ,
胡蝶 ^1, ,
郭铌 ^1,

1.
zhongguoqixiangjulanzhouganhanqixiangyanjiusuo，gansushengganhanqihoubianhuayujianzaizhongdianshiyanshi，zhongguoqixiangjuganhanqihoubianhuayujianzaizhongdianshiyanshi，gansu lanzhou 730020
2.
sunanyuguzuzizhixianqixiangju，gansu zhangye 734400
3.
亚博滚球 maquxianqixiangju，gannan maqu 747300

作者简介: 王玮(1985-)，男，甘肃兰州人，副研究员，主要从事遥感与GIS应用研究。E-mail: wangw@iamcma.cn;

通讯作者: 王丽娟, wanglj@iamcma.cn

基金项目: 甘肃省气象局气象科研项目(ZcMs2020-22)；国家自然科学基金项目(41805086、41801191、 31672484、31702175)

摘要: 利用祁连山自动站实测地表温度数据，对中分辨率成像光谱仪(Moderate-resolution imaging spectroradiometer, MODIS)地表温度(Land surface temperature, LST)日产品(MOD/MYD11A1)进行真实性检验和对比分析，评价不同下垫面上MODIS LST标准产品的空间适应性，订正由地表类型变化而引起MODIS LST产品的误差。结果表明，在祁连山西段海拔相对较低的荒漠草地上，MOD11A1 LST产品与实测地表温度数据具有较高的空间一致性，平均误差和均方根误差较低，分别为1.62和3.88 ℃；在祁连山海拔相对较高的东段山地草甸和中段高寒草地上，MYD11A1 LST产品精度较高，平均误差为2.02和3.72 ℃，均方根误差为5.12和6.92 ℃。在祁连山地区，MODIS LST产品精度不仅受地表类型的影响，同时还受植被覆盖度和海拔高度的影响。在海拔相对较高的祁连山东段山地草甸和中段高寒草地区，由于地表升温速度慢，植被盖度较高，MOD11A1 LST产品的精度较低，且高估了该地区的实际地表温度，均方根误差达到5.12 ℃以上。通过误差订正可有效提高MODIS LST产品在祁连山山地草甸、高寒草地和荒漠草地上的精度，均方根误差分别降低了1.29、2.66和0.91 ℃。

关键词:

English

Validation of MODIS land surface temperature products in grasslands of Qilian Mountain

Wei WANG ^1, ,
Lijuan WANG ^{1,
,} ,
Wuhong SUN ^2, ,
Ang DAI ^3, ,
Die HU ^1, ,
Ni GUO ^1,

1.
key laboratory of arid climatic change and reducing disaster of gansu province, key open laboratory of arid change and disaster reduction of cma, institute of arid meteorology, china meteorological administration, lanzhou 730020, gansu, china
2.
weather bureau of sunan yugu autonomous county, zhangye 734400, gansu, china
3.
weather bureau of maqu county, gannan 747300, gansu, china

Corresponding author: Lijuan WANG, wanglj@iamcma.cn

Received Date: 2019-06-02
Available Online: 2019-12-15

Abstract: Land surface temperature (LST) values measured at automatic weather stations in Qilian Mountain in China, were adopted to perform validation tests and comparative analysis of daily Moderate Resolution Imaging Spectroradiometer (MODIS) LST products (MOD/MYD11A1). The aim of the study was to assess the space adaptability of standard MODIS LST products on different underlying surfaces and to correct the error detected in these products due to changes in land surface types. The results indicated that in desert grasslands with low altitudes in the western section of Qilian Mountain, MOD11A1 LST products showed higher space consistency and adaptability, with respect to the measured LST. The average error and root mean square error (RMSE) were 1.62 ℃ and 3.88 ℃, respectively. On the mountain grassland in the eastern section and alpine grassland in the middle section of Qilian Mountain, which had higher altitudes, MYD11A1 LST products showed higher accuracy; average errors were 2.02 ℃ and 3.72 ℃, respectively, while the RMSEs were 5.12 ℃ and 6.92 ℃, respectively. In addition to the effect of land surface types, the accuracy of MODIS LST products is also influenced by vegetation cover and altitude, as seen in the Qilian Mountain. On the mountain grassland in the eastern section and alpine grassland in the middle section of Qilian Mountain, which have higher altitudes, MOD11A1 LST products showed less accuracy due to the slow rate of temperature rise and high vegetation coverage, which resulted in an overestimation of the actual LST in these areas, with an error of over 5.12 ℃. With the help of error correction, the accuracies of MODIS LST products when used on mountain, alpine, and desert grasslands of the Qilian Mountain were effectively improved, as the RMSEs of the products were reduced by 1.29, 2.66, and 0.91 ℃, respectively.

Key words:

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亚博滚球

图 1 亚博滚球祁连山植被类型和生态定位站位置图

Figure 1. Vegetation types and ecological positioning stations location in the Qilian Mountains

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图 2 仪器组成及架设环境图

Figure 2. 亚博滚球 Instrument composition and set up environment

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图 3 亚博滚球数据处理流程图

Figure 3. Flow of the data processing

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图 4 2019年6月5日-12月31日自动站实测地表温度数据

Figure 4. 亚博滚球 Land surface temperature data at automatic stations between June 5 to December 31, 2019

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图 5 中分辨率成像光谱仪地表温度产品MOD11A1和MYD11A1空间分布图

Figure 5. Results of moderate-resolution imaging spectroradiometer (MODIS) land surface temperature (LST) products

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图 6 地表温度实测数据与MODIS LST产品采样值对比

Figure 6. 亚博滚球 Comparison between the MODIS LST sampled values and the LST observed values in automatic stations

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图 7 亚博滚球和中分辨率成像光谱仪(Moderate-resolution imaging spectroradiometer, MODIS)卫星过境有不同时差的站点观测数据与地表温度产品采样值对比

Figure 7. 亚博滚球 Comparison of observation data from stations with different time from moderate-resolution imaging spectroradiometer (MODIS) satellites transit and sampling value of MODIS land surface temperature (LST) products

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表 1 自动站安装介绍

Table 1. Introduction of automatic weather station installation

观测项目 Items	仪器型号 Sensor	安装高度 Sensor height/m	观测时段 Observation time /d	观测频次 Observation frequency/h
地表温度 Land surface temperature	SI-411	1.5	2019.06−今 2019.06 to now	0.25
归一化植被指数 Normalized differential vegetation index	SKR 1800	1.5	2019.06−今 2019.06 to now
土壤温湿度(5层) Soil temperature and moisture (5 Layers)	Campbell 107/CS616	−0.05、−0.1、 −0.2、−0.3、−0.4	2019.07−今 2019.07 till date

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表 2 中分辨率成像光谱仪地表温度产品精度分析

Table 2. Accuracy analysis of moderate-resolution imaging spectroradiometer (MODIS) land surface temperature (LST) products

站点 Stations	植被类型 Vegetation type	地表温度上午星产品 Land surface temperature products in the morning (MOD11A1)/ ℃			地表温度下午星产品 Land Surface temperature products in the afternoon (MYD11A1)/ ℃
站点 Stations	植被类型 Vegetation type	Pa	Pd	RMSE	Pa	Pd	RMSE
皇城镇 Huangcheng (HC)	山地草甸 Mountain grassland	−2.77	4.07	5.52	2.02	3.73	5.12
康乐乡 Kangle (KL)	高寒草地 Alpine grassland	4.03	5.91	7.16	3.72	5.14	6.92
祁丰乡 Qifeng (QF)	荒漠草地 Desert grassland	1.62	2.89	3.88	1.92	3.04	4.11

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表 3 祁连山中分辨率成像光谱仪地表温度产品订正

Table 3. 亚博滚球 Revision of moderate-resolution imaging spectroradiometer (MODIS) land surface temperature (LST) products in Qilian Mountains

站点 Stations	植被类型 Vegetation type	公式 Linear formula	R²	适用数据 Applicable data
皇城镇 Huangcheng (HC)	山地草甸 Mountain meadow	y = 0.65x + 0.72	0.74	地表温度下午星产品 Land surface temperature products in the afternoon (MYD11A1)
康乐乡 Kangle (KL)	高寒草地 Alpine grassland	y = 0.74x − 2.61	0.65	地表温度下午星产品 Land surface temperature products in the afternoon (MYD11A1)
祁丰乡 Qifeng (QF)	荒漠草地 Desert grassland	y = 0.82x + 0.745	0.80	地表温度上午星产品 Land surface temperature products in the morning (MOD11A1)

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表 4 亚博滚球经订正后的中分辨率成像光谱仪地表温度产品精度分析

Table 4. 亚博滚球 Accuracy analysis of orrected moderate-resolution imaging spectroradiometer (MODIS) land surface temperature (LST) products

站点 Stations	Pa / ℃	Pd/ ℃	RMSE/ ℃
皇城镇 Huangcheng (HC)	1.84	2.97	3.83
康乐乡 Kangle (KL)	2.82	3.57	4.26
祁丰乡 Qifeng (QF)	1.17	2.65	2.97

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通讯作者: 陈斌,

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亚博滚球shenyanghuagongdaxuecailiaokexueyugongchengxueyuan shenyang 110142

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亚博滚球

祁连山草地MODIS LST产品真实性检验

作者简介: 王玮(1985-)，男，甘肃兰州人，副研究员，主要从事遥感与GIS应用研究。E-mail: wangw@iamcma.cn;

通讯作者: 王丽娟, wanglj@iamcma.cn

English

Validation of MODIS land surface temperature products in grasslands of Qilian Mountain

Corresponding author: Lijuan WANG, wanglj@iamcma.cn

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