In:
Climate of the Past, Copernicus GmbH, Vol. 17, No. 1 ( 2021-01-06), p. 21-36
Abstract:
Abstract. We carry out three sets of last interglacial (LIG)
experiments, named lig127k, and of pre-industrial experiments, named
piControl, both as part of PMIP4/CMIP6 using three versions of the MIROC
model: MIROC4m, MIROC4m-LPJ, and MIROC-ES2L. The results are compared with
reconstructions from climate proxy data. All models show summer warming over
northern high-latitude land, reflecting the differences between the
distributions of the LIG and present-day solar irradiance. Globally averaged
temperature changes are −0.94 K (MIROC4m), −0.39 K (MIROC4m-LPJ), and −0.43 K
(MIROC-ES2L). Only MIROC4m-LPJ, which includes dynamical vegetation feedback
from the change in vegetation distribution, shows annual mean warming
signals at northern high latitudes, as indicated by proxy data. In contrast,
the latest Earth system model (ESM) of MIROC, MIROC-ES2L, which considers
only a partial vegetation effect through the leaf area index, shows no
change or even annual cooling over large parts of the Northern Hemisphere.
Results from the series of experiments show that the inclusion of full
vegetation feedback is necessary for the reproduction of the strong annual
warming over land at northern high latitudes. The LIG experimental results
show that the warming predicted by models is still underestimated, even with
dynamical vegetation, compared to reconstructions from proxy data,
suggesting that further investigation and improvement to the climate
feedback mechanism are needed.
Type of Medium:
Online Resource
ISSN:
1814-9332
DOI:
10.5194/cp-17-21-2021
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2021
detail.hit.zdb_id:
2217985-9
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