Diurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data

Diurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data

Abstract Analysis of cloud cover and its diurnal variation over the Tibetan Plateau (TP) is highly reliant on satellite data; however, the accuracy of cloud detection from both polar-orbiting and geostationary satellites over this area remains unclear. The new-generation geostationary Himawari-8 sat...

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Autores principales: Huazhe Shang, Husi Letu, Takashi Y. Nakajima, Ziming Wang, Run Ma, Tianxing Wang, Yonghui Lei, Dabin Ji, Shenshen Li, Jiancheng Shi
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Lenguaje:EN
Publicado: Nature Portfolio 2018
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Acceso en línea:https://doaj.org/article/e0c3e2c9c3274f4d961205a8eb77ddfe
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spelling oai:doaj.org-article:e0c3e2c9c3274f4d961205a8eb77ddfe2021-12-02T15:09:09ZDiurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data10.1038/s41598-018-19431-w2045-2322https://doaj.org/article/e0c3e2c9c3274f4d961205a8eb77ddfe2018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-19431-whttps://doaj.org/toc/2045-2322Abstract Analysis of cloud cover and its diurnal variation over the Tibetan Plateau (TP) is highly reliant on satellite data; however, the accuracy of cloud detection from both polar-orbiting and geostationary satellites over this area remains unclear. The new-generation geostationary Himawari-8 satellites provide high-resolution spatial and temporal information about clouds over the Tibetan Plateau. In this study, the cloud detection of MODIS and AHI is investigated and validated against CALIPSO measurements. For AHI and MODIS, the false alarm rate of AHI and MODIS in cloud identification over the TP was 7.51% and 1.94%, respectively, and the cloud hit rate was 73.55% and 80.15%, respectively. Using hourly cloud-cover data from the Himawari-8 satellites, we found that at the monthly scale, the diurnal cycle in cloud cover over the TP tends to increase throughout the day, with the minimum and maximum cloud fractions occurring at 10:00 a.m. and 18:00 p.m. local time. Due to the limited time resolution of polar-orbiting satellites, the underestimation of MODIS daytime average cloud cover is approximately 4.00% at the annual scale, with larger biases during the spring (5.40%) and winter (5.90%).Huazhe ShangHusi LetuTakashi Y. NakajimaZiming WangRun MaTianxing WangYonghui LeiDabin JiShenshen LiJiancheng ShiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Huazhe Shang
Husi Letu
Takashi Y. Nakajima
Ziming Wang
Run Ma
Tianxing Wang
Yonghui Lei
Dabin Ji
Shenshen Li
Jiancheng Shi
Diurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data
description Abstract Analysis of cloud cover and its diurnal variation over the Tibetan Plateau (TP) is highly reliant on satellite data; however, the accuracy of cloud detection from both polar-orbiting and geostationary satellites over this area remains unclear. The new-generation geostationary Himawari-8 satellites provide high-resolution spatial and temporal information about clouds over the Tibetan Plateau. In this study, the cloud detection of MODIS and AHI is investigated and validated against CALIPSO measurements. For AHI and MODIS, the false alarm rate of AHI and MODIS in cloud identification over the TP was 7.51% and 1.94%, respectively, and the cloud hit rate was 73.55% and 80.15%, respectively. Using hourly cloud-cover data from the Himawari-8 satellites, we found that at the monthly scale, the diurnal cycle in cloud cover over the TP tends to increase throughout the day, with the minimum and maximum cloud fractions occurring at 10:00 a.m. and 18:00 p.m. local time. Due to the limited time resolution of polar-orbiting satellites, the underestimation of MODIS daytime average cloud cover is approximately 4.00% at the annual scale, with larger biases during the spring (5.40%) and winter (5.90%).
format article
author Huazhe Shang
Husi Letu
Takashi Y. Nakajima
Ziming Wang
Run Ma
Tianxing Wang
Yonghui Lei
Dabin Ji
Shenshen Li
Jiancheng Shi
author_facet Huazhe Shang
Husi Letu
Takashi Y. Nakajima
Ziming Wang
Run Ma
Tianxing Wang
Yonghui Lei
Dabin Ji
Shenshen Li
Jiancheng Shi
author_sort Huazhe Shang
title Diurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data
title_short Diurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data
title_full Diurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data
title_fullStr Diurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data
title_full_unstemmed Diurnal cycle and seasonal variation of cloud cover over the Tibetan Plateau as determined from Himawari-8 new-generation geostationary satellite data
title_sort diurnal cycle and seasonal variation of cloud cover over the tibetan plateau as determined from himawari-8 new-generation geostationary satellite data
publisher Nature Portfolio
publishDate 2018
url https://doaj.org/article/e0c3e2c9c3274f4d961205a8eb77ddfe
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