Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Modeling the water isotopes in Greenland precipitation 1959–2001 with the meso-scale model REMO-iso

Sjolte, J. LU orcid ; Hoffmann, G. LU ; Johnsen, S. J. ; Vinther, B. M. ; Masson-delmotte, V. and Sturm, C. (2011) In Journal of Geophysical Research 116(D18). p.1-22
Abstract
Ice core studies have proved thed18O in Greenland precipitation to be correlated to thephase of the North Atlantic Oscillation (NAO). This subject has also been investigated inmodeling studies. However, these studies have either had severe biases in thed18O levels,or have not been designed to be compared directly with observations. In this study wenudge a meso‐scale climate model fitted with stable water isotope diagnostics (REMO‐iso)to follow the actual weather patterns for the period 1959–2001. We evaluate thissimulation using meteorological observations from stations along the Greenland coast,andd18O from several Greenland ice core stacks and Global Network In Precipitation(GNIP) data from Greenland, Iceland and Svalbard. The REMO‐iso... (More)
Ice core studies have proved thed18O in Greenland precipitation to be correlated to thephase of the North Atlantic Oscillation (NAO). This subject has also been investigated inmodeling studies. However, these studies have either had severe biases in thed18O levels,or have not been designed to be compared directly with observations. In this study wenudge a meso‐scale climate model fitted with stable water isotope diagnostics (REMO‐iso)to follow the actual weather patterns for the period 1959–2001. We evaluate thissimulation using meteorological observations from stations along the Greenland coast,andd18O from several Greenland ice core stacks and Global Network In Precipitation(GNIP) data from Greenland, Iceland and Svalbard. The REMO‐iso output explains up to40% of the interannuald18O variability observed in ice cores, which is comparable to themodel performance for precipitation. In terms of reproducing the observed variabilitythe global model, ECHAM4‐iso performs on the same level as REMO‐iso. However,REMO‐iso has smaller biases ind18O and improved representation of the observed spatiald18O‐temperature slope compared to ECHAM4‐iso. Analysis of the main modes of wintervariability ofd18O shows a coherent signal in Central and Western Greenland similarto results from ice cores. The NAO explains 20% of the leadingd18O pattern. Based on themodel output we suggest that methods to reconstruct the NAO from Greenland ice coresemploy bothd18O and accumulation records (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Geophysical Research
volume
116
issue
D18
pages
1 - 22
publisher
Wiley-Blackwell
external identifiers
  • scopus:80053363455
ISSN
0148-0227
DOI
10.1029/2010JD015287
language
English
LU publication?
yes
id
b7379750-d336-4ef0-9fb1-897afe8c45b6
date added to LUP
2019-06-19 10:49:46
date last changed
2021-09-22 01:23:37
@article{b7379750-d336-4ef0-9fb1-897afe8c45b6,
  abstract     = {Ice core studies have proved thed18O in Greenland precipitation to be correlated to thephase of the North Atlantic Oscillation (NAO). This subject has also been investigated inmodeling studies. However, these studies have either had severe biases in thed18O levels,or have not been designed to be compared directly with observations. In this study wenudge a meso‐scale climate model fitted with stable water isotope diagnostics (REMO‐iso)to follow the actual weather patterns for the period 1959–2001. We evaluate thissimulation using meteorological observations from stations along the Greenland coast,andd18O from several Greenland ice core stacks and Global Network In Precipitation(GNIP) data from Greenland, Iceland and Svalbard. The REMO‐iso output explains up to40% of the interannuald18O variability observed in ice cores, which is comparable to themodel performance for precipitation. In terms of reproducing the observed variabilitythe global model, ECHAM4‐iso performs on the same level as REMO‐iso. However,REMO‐iso has smaller biases ind18O and improved representation of the observed spatiald18O‐temperature slope compared to ECHAM4‐iso. Analysis of the main modes of wintervariability ofd18O shows a coherent signal in Central and Western Greenland similarto results from ice cores. The NAO explains 20% of the leadingd18O pattern. Based on themodel output we suggest that methods to reconstruct the NAO from Greenland ice coresemploy bothd18O and accumulation records},
  author       = {Sjolte, J. and Hoffmann, G. and Johnsen, S. J. and Vinther, B. M. and Masson-delmotte, V. and Sturm, C.},
  issn         = {0148-0227},
  language     = {eng},
  number       = {D18},
  pages        = {1--22},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Geophysical Research},
  title        = {Modeling the water isotopes in Greenland precipitation 1959–2001 with the meso-scale model REMO-iso},
  url          = {http://dx.doi.org/10.1029/2010JD015287},
  doi          = {10.1029/2010JD015287},
  volume       = {116},
  year         = {2011},
}