Light-absorbing snow impurity concentrations measured on Northwest Greenland ice sheet in 2011 and 2012

IF 0.3 Q4 GEOGRAPHY, PHYSICAL

Bulletin of glaciological research Pub Date : 2014-01-01 DOI:10.5331/BGR.32.21

T. Aoki, S. Matoba, S. Yamaguchi, T. Tanikawa, M. Niwano, K. Kuchiki, K. Adachi, J. Uetake, H. Motoyama, M. Hori

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引用次数: 36

Abstract

Light-absorbingsnowimpuritiesofelementalcarbon�(EC),�organiccarbon�(OC),�andmineraldusthave� beenmeasuredatthreelocationsatelevationsfrom�1,469�to�1,992�monAugust�1,�2011,�andatthesite� SIGMA-A�(78�N,�68�W,�elevation�1,490�m)�onthenorthwestGreenlandicesheet�(GrIS)�duringtheperiod� fromJune�28�toJuly�12,�2012.　AtSIGMA-A,�aremarkablesnowsurfaceloweringtogetherwithsnow� meltingwasobservedduringtheobservationperiodin�2012,�whenarecordsurfacemeltingeventoccurred� overtheGrIS.� Theconcentrationsinthesurfacewere� 0.9,� 3.8,� and� 107�ppbwforEC,� OC,� anddust,� respectively,�atthebeginningoftheperiod,�whichincreasedto�4.9,�17.2,�and�1327�ppbwforEC,�OC,�anddust,� respectively,�attheend.　TheECanddustconcentrationswereremarkablyhigherthanthoseatthethree� locationsin�2011�andtherecentmeasurementsatSummit.　However,�ourmeasurementsforECandOC� couldbeunderestimatedbecausearecentstudyindicatesthatthecollectionefficiencyofaquartzfiber�

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2011年和2012年格陵兰西北冰盖吸光雪杂质浓度测定

2011年8月1日，在海拔1469至1992的三个地点，以及2012年6月28日至7月12日期间，在西北格陵兰冰盖(GrIS)的SIGMA-A(北纬78度，西经68度，海拔1490米)地点，测量了吸收光的雪杂质——元素碳(EC)、有机碳(OC)和矿物质尘埃。在2012年的观测期内，观测到明显的地表下降和积雪融化，当时有记录的地表融化事件发生在gris上。在这一时期开始时，地表的浓度分别为0.9、3.8和107 ppbwforEC、OC和dust，在这一时期结束时，浓度分别增加到4.9、17.2和1327 ppbwforEC、OC和dust。TheECanddustconcentrationswereremarkablyhigherthanthoseatthethree�locationsin�2011�andtherecentmeasurementsatSummit。然而,�ourmeasurementsforECandOC�couldbeunderestimatedbecausearecentstudyindicatesthatthecollectionefficiencyofaquartzfiber�

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来源期刊

Bulletin of glaciological research GEOGRAPHY, PHYSICAL-

CiteScore

2.20

自引率

20.00%

发文量