noaa-model-12483
LOVECLIM Climate Model Simulation Constrained by Mann et al. 2009 Reconstruction
Goosse, H.; Crespin, E.; Dubinkina, S.; Loutre, M.F.; Mann, M.E.; Renssen, H.; Sallaz-Damaz, Y.; Shindell, D.
LOVECLIM Climate Model Simulation Constrained by Mann et al. 2009 Reconstruction
2012-02-10
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12483
Investigator
H.
Goosse
Investigator
E.
Crespin
Investigator
S.
Dubinkina
Investigator
M.F.
Loutre
Investigator
M.E.
Mann
Investigator
H.
Renssen
Investigator
Y.
Sallaz-Damaz
Investigator
D.
Shindell
earth science
paleoclimate
paleoclimatic modeling
latitude,null,null,degree north,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
age,null,null,year Common Era,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
paleoclimatic modeling
surface air temperature,null,null,degree Celsius,annual,paleoclimatic modeling,anomalized,null,N,null
earth science
paleoclimate
paleoclimatic modeling
longitude,null,null,degree east,null,paleoclimatic modeling,null,null,N,null
earth science
paleoclimate
model
atmosphere model
geoscientificInformation
Medieval Climate Anomaly (MCA)
500 AD
2000 AD
1450 cal yr BP
-50 cal yr BP
Complete
-90
90
-180
180
Geographic Region
Global
Global>LATITUDE >LONGITUDE
None
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English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Goosse, H., E. Crespin, S. Dubinkina, M.F. Loutre, M.E. Mann,
H. Renssen, Y. Sallaz-Damaz, and D. Shindell. 2012.
The role of forcing and internal dynamics in explaining
the "Medieval Climate Anomaly".
Climate Dynamics, doi: 10.1007/s00382-012-1297-0
Proxy reconstructions suggest that peak global temperature
during the past warm interval known as the Medieval Climate
Anomaly (MCA, roughly 950-1250 AD) has been exceeded only
during the most recent decades. To better understand the
origin of this warm period, we use model simulations
constrained by data assimilation establishing the spatial
pattern of temperature changes that is most consistent
with forcing estimates, model physics and the empirical
information contained in paleoclimate proxy records.
These numerical experiments demonstrate that the
reconstructed spatial temperature pattern of the MCA
can be explained by a simple thermodynamical response
of the climate system to relatively weak changes in radiative
forcing combined with a modification of the atmospheric
circulation, displaying some similarities with the positive
phase of the so-called Arctic Oscillation, and with northward
shifts in the position of the Gulf Stream and Kuroshio currents.
The mechanisms underlying the MCA are thus quite different
from anthropogenic mechanisms responsible for modern global
warming.
STUDY NOTES: We have performed simulations with the LOVECLIM climate model
(Goosse et al. 2010) using a so-called "particle filter"
(van Leeuwen 2009; Dubinkina et al. 2011) that constrains model
results to follow the signal provided by an annual mean surface
temperature reconstruction based on a global proxy data network
(Mann et al. 2009). The central variable in our results is thus
also the annual mean temperature. The data constrain is applied
only over the region 30-90°N so this is the only region where
a good agreement with the reconstruction is expected.
The data is in the file ts_LOVECLIM_ASSIM_MANN2009.nc.
It includes annual mean temperatures on a Gaussian 62 x 32 grid.
The data is in netCDF format and contains one variable, ts,
the surface temperature in the model in °C for the period 501AD-2000AD.
It is the best estimate provided by the data assimilation method.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/goosse2012/ts_loveclim_assim_mann2009.nc
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/goosse2012/readme-goosse2012.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/gcmoutput/goosse2012/ts_loveclim_assim_mann2009.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11