气候变化领域集成服务门户(CCPortal): Reconstructing the mass balance of Brewster glacier, New Zealand, using MODIS-derived glacier-wide albedo

CCPortal

DOI	10.5194/tc-10-2465-2016
	Reconstructing the mass balance of Brewster glacier, New Zealand, using MODIS-derived glacier-wide albedo
	Sirguey P.; Still H.; Cullen N.J.; Dumont M.; Arnaud Y.; Conway J.P.
发表日期	2016
ISSN	19940416
卷号	10 期号:5
英文摘要	In New Zealand, direct measurements of mass balance are sparse due to the inaccessibility of glaciers in the Southern Alps and the logistical difficulties associated with maintaining a mass balance record. In order to explore the benefit of remotely sensed imaging to monitor mass balance in the Southern Alps, this research assesses the relationship between measurements of glacier surface albedo derived from Moderate Resolution Imaging Spectroradiometer (MODIS) and mass balance observations using the glaciological method on Brewster Glacier over the 2005-2013 period. We confirm that minimum glacier-wide albedo is a reliable predictor for annual mass balance in this maritime environment (R2 Combining double low line 0.93). Furthermore, we show that regular monitoring of glacier-wide albedo enables a new metric of winter accumulation to be derived, namely the cumulative winter albedo, which is found to correlate strongly with winter mass balance (R2 Combining double low line 0.88), thus enabling the reconstruction of separate winter and summer mass balance records. This allows the mass balance record for Brewster Glacier to be extended back to the start of MODIS observations in 2000 and to confirm that the annual balance of Brewster Glacier is largely controlled by summer balance (R2 Combining double low line 92%). An application of the extended record is proposed whereby the relationship between mass balance and the photographic record of the end-of-summer snowline altitude is assessed. This allowed the annual balance record of Brewster Glacier to be reconstructed over the period 1977-2013, thus providing the longest record of mass balance for a glacier in New Zealand. Over the 37-year period, our results show that Brewster Glacier gained a significant mass of up to 14.5±2.7mw.e. by 2007. This gain was offset by a marked shift toward negative balances after 2008, yielding a loss of 5.1±1.2mw.e., or 35% of the gain accumulated over the previous 30 years. The good correspondence between mass balance of Brewster Glacier and the phase of the Pacific (Inter-)Decadal Oscillation (PDO/IPO), associated with the fast terminus retreat observed between 1978 and 1998, strongly suggests that the observed mass gain of Brewster Glacier since 1977 is only offsetting a longer sequence of dominantly negative balances.
学科领域	albedo; glacier mass balance; MODIS; Pacific Decadal Oscillation; photography; reconstruction; seasonality; snow accumulation; surface reflectance; Alps; Brewster Glacier; New Zealand; New Zealand; South Island; West Coast [South Island]
语种	英语
scopus关键词	albedo; glacier mass balance; MODIS; Pacific Decadal Oscillation; photography; reconstruction; seasonality; snow accumulation; surface reflectance; Alps; Brewster Glacier; New Zealand; New Zealand; South Island; West Coast [South Island]
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/119561
作者单位	School of Surveying, University of Otago, Dunedin, New Zealand; Department of Geography, University of Otago, Dunedin, New Zealand; Météo France/CRNS, CNRM-UMR3589, CEN, Grenoble, France; IRD/UGA/CNRS/INPG, Laboratoire d'étude des Transferts en Hydrologie et Environnement (LTHE), UMR5564, Grenoble, 38041, France; Bodeker Scientific, Alexandra, New Zealand
推荐引用方式 GB/T 7714	Sirguey P.,Still H.,Cullen N.J.,et al. Reconstructing the mass balance of Brewster glacier, New Zealand, using MODIS-derived glacier-wide albedo[J],2016,10(5).
APA	Sirguey P.,Still H.,Cullen N.J.,Dumont M.,Arnaud Y.,&Conway J.P..(2016).Reconstructing the mass balance of Brewster glacier, New Zealand, using MODIS-derived glacier-wide albedo.Cryosphere,10(5).
MLA	Sirguey P.,et al."Reconstructing the mass balance of Brewster glacier, New Zealand, using MODIS-derived glacier-wide albedo".Cryosphere 10.5(2016).