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Title: Collaborative Project: Development of an Isotope-Enabled CESM for Testing Abrupt Climate Changes

Abstract

One of the most important validations for a state-of-art Earth System Model (ESM) with respect to climate changes is the simulation of the climate evolution and abrupt climate change events in the Earth’s history of the last 21,000 years. However, one great challenge for model validation is that ESMs usually do not directly simulate geochemical variables that can be compared directly with past proxy records. In this proposal, we have met this challenge by developing the simulation capability of major isotopes in a state-of-art ESM, the Community Earth System Model (CESM), enabling us to make direct model-data comparison by comparing the model directly against proxy climate records. Our isotope-enabled ESM incorporates the capability of simulating key isotopes and geotracers, notably δ 18O, δD, δ 14C, and δ 13C, Nd and Pa/Th. The isotope-enabled ESM have been used to perform some simulations for the last 21000 years. The direct comparison of these simulations with proxy records has shed light on the mechanisms of important climate change events.

Authors:
 [1]
  1. Univ. of Wisconsin, Madison, WI (United States). Dept. of Atmospheric and Oceanic Sciences
Publication Date:
Research Org.:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Earth System Modeling (ESM) Program
OSTI Identifier:
1417902
Report Number(s):
14-09085
DOE Contract Number:  
SC0006932
Resource Type:
Technical Report
Resource Relation:
Related Information: OSTI ID # for final technical report 1409085
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 58 GEOSCIENCES

Citation Formats

Liu, Zhengyu. Collaborative Project: Development of an Isotope-Enabled CESM for Testing Abrupt Climate Changes. United States: N. p., 2018. Web. doi:10.2172/1417902.
Liu, Zhengyu. Collaborative Project: Development of an Isotope-Enabled CESM for Testing Abrupt Climate Changes. United States. doi:10.2172/1417902.
Liu, Zhengyu. Wed . "Collaborative Project: Development of an Isotope-Enabled CESM for Testing Abrupt Climate Changes". United States. doi:10.2172/1417902. https://www.osti.gov/servlets/purl/1417902.
@article{osti_1417902,
title = {Collaborative Project: Development of an Isotope-Enabled CESM for Testing Abrupt Climate Changes},
author = {Liu, Zhengyu},
abstractNote = {One of the most important validations for a state-of-art Earth System Model (ESM) with respect to climate changes is the simulation of the climate evolution and abrupt climate change events in the Earth’s history of the last 21,000 years. However, one great challenge for model validation is that ESMs usually do not directly simulate geochemical variables that can be compared directly with past proxy records. In this proposal, we have met this challenge by developing the simulation capability of major isotopes in a state-of-art ESM, the Community Earth System Model (CESM), enabling us to make direct model-data comparison by comparing the model directly against proxy climate records. Our isotope-enabled ESM incorporates the capability of simulating key isotopes and geotracers, notably δ18O, δD, δ14C, and δ13C, Nd and Pa/Th. The isotope-enabled ESM have been used to perform some simulations for the last 21000 years. The direct comparison of these simulations with proxy records has shed light on the mechanisms of important climate change events.},
doi = {10.2172/1417902},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 24 00:00:00 EST 2018},
month = {Wed Jan 24 00:00:00 EST 2018}
}

Technical Report:

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