Investigating the past and recent d¹⁸O-accumulation relationship seen in Greenland ice cores

TY - JOUR

T1 - Investigating the past and recent d18O-accumulation relationship seen in Greenland ice cores

AU - Buchardt, Susanne Lilja

AU - Clausen, Henrik Brink

AU - Vinther, Bo Møllesøe

AU - Dahl-Jensen, Dorthe

PY - 2012/4/1

Y1 - 2012/4/1

N2 - Decadal means of δ18O and accumulation rates from 52 ice core locations in Greenland are presented. The accumulation rates are derived from annual layers determined in the δ18O curve. Investigation of the δ18O-accumulation relationship across the ice divide reveals a significant Foehn effect with anticorrelation of δ18O and accumulation rate on the lee side of the divide in Southern Greenland, while no effect is seen in Central Greenland. Furthermore, the sensitivity of accumulation rate to changes in temperature is found to be smaller in Northern Greenland than in the central and southern parts. Four records in the data set contain sufficient recent data that the period of observed temperature rise from the 1990s and onwards can be investigated. All four records are from locations close to the ice divide in Northern Greenland and while three of them show increased temperatures, no conclusive statement can be made about the accumulation rate from these data.

AB - Decadal means of δ18O and accumulation rates from 52 ice core locations in Greenland are presented. The accumulation rates are derived from annual layers determined in the δ18O curve. Investigation of the δ18O-accumulation relationship across the ice divide reveals a significant Foehn effect with anticorrelation of δ18O and accumulation rate on the lee side of the divide in Southern Greenland, while no effect is seen in Central Greenland. Furthermore, the sensitivity of accumulation rate to changes in temperature is found to be smaller in Northern Greenland than in the central and southern parts. Four records in the data set contain sufficient recent data that the period of observed temperature rise from the 1990s and onwards can be investigated. All four records are from locations close to the ice divide in Northern Greenland and while three of them show increased temperatures, no conclusive statement can be made about the accumulation rate from these data.

U2 - 10.5194/cp-8-2053-2012

DO - 10.5194/cp-8-2053-2012

M3 - Journal article

SN - 1814-9324

VL - 8

SP - 2053

EP - 2059

JO - Climate of the Past

JF - Climate of the Past

ER -