气候变化领域集成服务门户(CCPortal): Changes of the tropical glaciers throughout Peru between 2000 and 2016

CCPortal

DOI	10.5194/tc-13-2537-2019
	Changes of the tropical glaciers throughout Peru between 2000 and 2016 - Mass balance and area fluctuations
	Seehaus T.; Malz P.; Sommer C.; Lippl S.; Cochachin A.; Braun M.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	2537
结束页码	2556
卷号	13 期号:10
英文摘要	Glaciers in tropical regions are very sensitive to climatic variations and thus strongly affected by climate change. The majority of the tropical glaciers worldwide are located in the Peruvian Andes, which have shown significant ice loss in the last century. Here, we present the first multi-temporal, region-wide survey of geodetic mass balances and glacier area fluctuations throughout Peru covering the period 2000-2016. Glacier extents are derived from Landsat imagery by performing automatic glacier delineation based on a combination of the NDSI and band ratio method and final manual inspection and correction. The mapping of debris-covered glacier extents is supported by synthetic aperture radar (SAR) coherence information. A total glacier area loss of $- 548.5 \pm 65.7$ km2 (-29 %, -34.3 km2 a-1) is obtained for the study period. Using interferometric satellite SAR acquisitions, bi-temporal geodetic mass balances are derived. An average specific mass balance of $- 296 \pm 41$ kg m-2 a-1 is found throughout Peru for the period 2000-2016. However, there are strong regional and temporal differences in the mass budgets ranging from 45±97 to $- 752 \pm 452$ kg m-2 a-1. The ice loss increased towards the end of the observation period. Between 2013 and 2016, a retreat of the glacierized area of $- 203.8 \pm 65.7$ km2 (-16 %, -101.9 km2 a-1) is mapped and the average mass budget amounts to $- 660 \pm 178$ kg m-2 a-1. The glacier changes revealed can be attributed to changes in the climatic settings in the study region, derived from ERA-Interim reanalysis data and the Oceanic Nino Index. The intense El Niño activities in 2015/16 are most likely the trigger for the increased change rates in the time interval 2013-2016. Our observations provide fundamental information on the current dramatic glacier changes for local authorities and for the calibration and validation of glacier change projections. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
学科领域	calibration; El Nino; geodetic network; glacier; Landsat; satellite; synthetic aperture radar
语种	英语
scopus关键词	calibration; El Nino; geodetic network; glacier; Landsat; satellite; synthetic aperture radar
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118831
作者单位	Institute of Geography, Friedrich-Alexander-Universität Erlangen-Nuremberg, Wetterkreuz 15, Erlangen, 91058, Germany; Unidad de Glaciología y Recursos Hídricos (UGRH), Autoridad Nacional Del Agua (ANA), Huaraz, 02001, Peru
推荐引用方式 GB/T 7714	Seehaus T.,Malz P.,Sommer C.,et al. Changes of the tropical glaciers throughout Peru between 2000 and 2016 - Mass balance and area fluctuations[J],2019,13(10).
APA	Seehaus T.,Malz P.,Sommer C.,Lippl S.,Cochachin A.,&Braun M..(2019).Changes of the tropical glaciers throughout Peru between 2000 and 2016 - Mass balance and area fluctuations.The Cryosphere,13(10).
MLA	Seehaus T.,et al."Changes of the tropical glaciers throughout Peru between 2000 and 2016 - Mass balance and area fluctuations".The Cryosphere 13.10(2019).