气候变化领域集成服务门户(CCPortal): Seasonal changes in surface albedo of Himalayan glaciers from MODIS data and links with the annual mass balance

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DOI	10.5194/tc-9-341-2015
	Seasonal changes in surface albedo of Himalayan glaciers from MODIS data and links with the annual mass balance
	Brun F.; Dumont M.; Wagnon P.; Berthier E.; Azam M.F.; Shea J.M.; Sirguey P.; Rabatel A.; Ramanathan Al.
发表日期	2015
ISSN	19940416
卷号	9 期号:1
英文摘要	Few glaciological field data are available on glaciers in the Hindu Kush-Karakoram-Himalayan (HKH) region, and remote sensing data are thus critical for glacier studies in this region. The main objectives of this study are to document, using satellite images, the seasonal changes of surface albedo for two Himalayan glaciers, Chhota Shigri Glacier (Himachal Pradesh, India) and Mera Glacier (Everest region, Nepal), and to reconstruct the annual mass balance of these glaciers based on the albedo data. Albedo is retrieved from Moderate Resolution Imaging Spectroradiometer (MODIS) images, and evaluated using ground based measurements. At both sites, we find high coefficients of determination between annual minimum albedo averaged over the glacier (AMAAG) and glacier-wide annual mass balance (Ba) measured with the glaciological method (R2 0.75). At Chhota Shigri Glacier, the relation between AMAAG found at the end of the ablation season and Ba suggests that AMAAG can be used as a proxy for the maximum snow line altitude or equilibrium line altitude (ELA) on winter-accumulation-type glaciers in the Himalayas. However, for the summer-accumulation-type Mera Glacier, our approach relied on the hypothesis that ELA information is preserved during the monsoon. At Mera Glacier, cloud obscuration and snow accumulation limits the detection of albedo during the monsoon, but snow redistribution and sublimation in the post-monsoon period allows for the calculation of AMAAG. Reconstructed Ba at Chhota Shigri Glacier agrees with mass balances previously reconstructed using a positive degree-day method. Reconstructed Ba at Mera Glacier is affected by heavy cloud cover during the monsoon, which systematically limited our ability to observe AMAAG at the end of the melting period. In addition, the relation between AMAAG and Ba is constrained over a shorter time period for Mera Glacier (6 years) than for Chhota Shigri Glacier (11 years). Thus the mass balance reconstruction is less robust for Mera Glacier than for Chhota Shigri Glacier. However our method shows promising results and may be used to reconstruct the annual mass balance of glaciers with contrasted seasonal cycles in the western part of the HKH mountain range since the early 2000s when MODIS images became available. © Author(s) 2015.
学科领域	albedo; annual variation; glacier; mass balance; remote sensing; satellite imagery; seasonal variation; snow accumulation; Himalayas
语种	英语
scopus关键词	albedo; annual variation; glacier; mass balance; remote sensing; satellite imagery; seasonal variation; snow accumulation; Himalayas
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119954
作者单位	Univ. Grenoble Alpes, CNRS, IRD, Grenoble, 38000, France; ENS, Geosciences Department, 24 rue Lhomond, Paris, 75005, France; ICIMOD, GP.O. Box 3226, Kathmandu, Nepal; Météo-France Andndash; CNRS, CNRM-GAME/CEN UMR3589, Grenoble, France; LEGOS, CNRS, Université de Toulouse, 14 av. Edouard Belin, Toulouse, 31400, France; School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India; School of Surveying, University of Otago, Dunedin, New Zealand; Univ. Grenoble Alpes, CNRS, LGGE, Grenoble, 38000, France
推荐引用方式 GB/T 7714	Brun F.,Dumont M.,Wagnon P.,et al. Seasonal changes in surface albedo of Himalayan glaciers from MODIS data and links with the annual mass balance[J],2015,9(1).
APA	Brun F..,Dumont M..,Wagnon P..,Berthier E..,Azam M.F..,...&Ramanathan Al..(2015).Seasonal changes in surface albedo of Himalayan glaciers from MODIS data and links with the annual mass balance.Cryosphere,9(1).
MLA	Brun F.,et al."Seasonal changes in surface albedo of Himalayan glaciers from MODIS data and links with the annual mass balance".Cryosphere 9.1(2015).