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Title: Climate Impacts of CALIPSO-Guided Corrections to Black Carbon Aerosol Vertical Distributions in a Global Climate Model

Abstract

Here, we alleviate the bias in the tropospheric vertical distribution of black carbon aerosols (BC) in the Community Atmosphere Model (CAM4) using the Cloud-Aerosol and Infrared Pathfinder Satellite Observations (CALIPSO)-derived vertical profiles. A suite of sensitivity experiments are conducted with 1x, 5x, and 10x the present-day model estimated BC concentration climatology, with (corrected, CC) and without (uncorrected, UC) CALIPSO-corrected BC vertical distribution. The globally averaged top of the atmosphere radiative flux perturbation of CC experiments is ~8–50% smaller compared to uncorrected (UC) BC experiments largely due to an increase in low-level clouds. The global average surface temperature increases, the global average precipitation decreases, and the ITCZ moves northward with the increase in BC radiative forcing, irrespective of the vertical distribution of BC. Further, tropical expansion metrics for the poleward extent of the Northern Hemisphere Hadley cell (HC) indicate that simulated HC expansion is not sensitive to existing model biases in BC vertical distribution.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1409263
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 44; Journal Issue: 20; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; BC vertical distribution; CALIPSO aerosol retrievals; radiative forcing; low-level clouds; Hadley cell widening

Citation Formats

Kovilakam, Mahesh, Mahajan, Salil, Saravanan, R., and Chang, Ping. Climate Impacts of CALIPSO-Guided Corrections to Black Carbon Aerosol Vertical Distributions in a Global Climate Model. United States: N. p., 2017. Web. doi:10.1002/2017GL074652.
Kovilakam, Mahesh, Mahajan, Salil, Saravanan, R., & Chang, Ping. Climate Impacts of CALIPSO-Guided Corrections to Black Carbon Aerosol Vertical Distributions in a Global Climate Model. United States. https://doi.org/10.1002/2017GL074652
Kovilakam, Mahesh, Mahajan, Salil, Saravanan, R., and Chang, Ping. Wed . "Climate Impacts of CALIPSO-Guided Corrections to Black Carbon Aerosol Vertical Distributions in a Global Climate Model". United States. https://doi.org/10.1002/2017GL074652. https://www.osti.gov/servlets/purl/1409263.
@article{osti_1409263,
title = {Climate Impacts of CALIPSO-Guided Corrections to Black Carbon Aerosol Vertical Distributions in a Global Climate Model},
author = {Kovilakam, Mahesh and Mahajan, Salil and Saravanan, R. and Chang, Ping},
abstractNote = {Here, we alleviate the bias in the tropospheric vertical distribution of black carbon aerosols (BC) in the Community Atmosphere Model (CAM4) using the Cloud-Aerosol and Infrared Pathfinder Satellite Observations (CALIPSO)-derived vertical profiles. A suite of sensitivity experiments are conducted with 1x, 5x, and 10x the present-day model estimated BC concentration climatology, with (corrected, CC) and without (uncorrected, UC) CALIPSO-corrected BC vertical distribution. The globally averaged top of the atmosphere radiative flux perturbation of CC experiments is ~8–50% smaller compared to uncorrected (UC) BC experiments largely due to an increase in low-level clouds. The global average surface temperature increases, the global average precipitation decreases, and the ITCZ moves northward with the increase in BC radiative forcing, irrespective of the vertical distribution of BC. Further, tropical expansion metrics for the poleward extent of the Northern Hemisphere Hadley cell (HC) indicate that simulated HC expansion is not sensitive to existing model biases in BC vertical distribution.},
doi = {10.1002/2017GL074652},
url = {https://www.osti.gov/biblio/1409263}, journal = {Geophysical Research Letters},
issn = {0094-8276},
number = 20,
volume = 44,
place = {United States},
year = {2017},
month = {9}
}

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Works referenced in this record:

Global wildland fire emissions from 1960 to 2000: GLOBAL FIRE EMISSIONS 1960-2000
journal, April 2008


Global and regional climate changes due to black carbon
journal, March 2008


Radiative forcing and climate response
journal, March 1997


Sensitivity of the Climate Response to the Altitude of Black Carbon in the Northern Subtropics in an Aquaplanet GCM
journal, August 2015


Assessment of the global impact of aerosols on tropospheric oxidants
journal, January 2005


Expansion of the Hadley Cell under Global Warming: Winter versus Summer
journal, December 2012


The Seasonal Cycle of Low Stratiform Clouds
journal, August 1993


The semi-direct aerosol effect: Impact of absorbing aerosols on marine stratocumulus
journal, April 2004


Global Indirect Radiative Forcing Caused by Aerosols
book, January 2009


Hadley Cell Widening: Model Simulations versus Observations
journal, May 2009


CALIPSO climatological products: evaluation and suggestions from EARLINET
journal, January 2016


The global 3-D distribution of tropospheric aerosols as characterized by CALIOP
journal, January 2013


Extratropical Influence on ITCZ Shifts in Slab Ocean Simulations of Global Warming
journal, January 2012


The effect of smoke, dust, and pollution aerosol on shallow cloud development over the Atlantic Ocean
journal, August 2005


The equilibrium sensitivity of the Earth's temperature to radiation changes
journal, October 2008


Linearity of Climate Response to Increases in Black Carbon Aerosols
journal, October 2013


Evaluation of factors controlling long-range transport of black carbon to the Arctic
journal, January 2011


Climate response of the South Asian monsoon system to anthropogenic aerosols: CLIMATE EFFECTS OF ANTHROPOGENIC AEROSOL
journal, July 2012


Assessing the relative contributions of transport efficiency and scavenging to seasonal variability in Arctic aerosol
journal, January 2010


Anthropogenic sulfate aerosol and the southward shift of tropical precipitation in the late 20th century: AEROSOLS AND TROPICAL RAIN BELT SHIFTS
journal, June 2013


Black carbon aerosol-induced Northern Hemisphere tropical expansion: BC AEROSOL-INDUCED TROPICAL EXPANSION
journal, June 2015


Recent Northern Hemisphere tropical expansion primarily driven by black carbon and tropospheric ozone
journal, May 2012


Evaluation of black carbon estimations in global aerosol models
journal, January 2009


The Joint Aerosol–Monsoon Experiment: A New Challenge for Monsoon Climate Research
journal, March 2008


Aerosol classification from airborne HSRL and comparisons with the CALIPSO vertical feature mask
journal, January 2013


Precipitation, radiative forcing and global temperature change: PRECIPITATION AND RADIATIVE FORCING
journal, July 2010


Changes in global-mean precipitation in response to warming, greenhouse gas forcing and black carbon: HYDROLOGICAL SENSITIVITY
journal, February 2011


Global sensitivity studies of the direct radiative forcing due to anthropogenic sulfate and black carbon aerosols
journal, March 1998


The CALIPSO Automated Aerosol Classification and Lidar Ratio Selection Algorithm
journal, October 2009


The equilibrium response to idealized thermal forcings in a comprehensive GCM: implications for recent tropical expansion
journal, January 2012


A spectral transform dynamical core option within the Community Atmosphere Model (CAM4)
journal, September 2014


Historical (1850–2000) gridded anthropogenic and biomass burning emissions of reactive gases and aerosols: methodology and application
journal, January 2010


Stratocumulus cloud thickening beneath layers of absorbing smoke aerosol
journal, January 2010


Solar absorption by elemental and brown carbon determined from spectral observations
journal, October 2012


Markedly enhanced absorption and direct radiative forcing of black carbon under polluted urban environments
journal, March 2016


Two opposing effects of absorbing aerosols on global-mean precipitation: EFFECTS OF ABSORBING AEROSOLS ON PRECIPITATION
journal, July 2010


Indirect Aerosol Forcing, Quasi Forcing, and Climate Response
journal, July 2001