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J. W. Yan
,
J. Y. Liu
,
B. Z. Chen
,
M. Feng
,
S. F. Fang
,
G. Xu
,
H. F. Zhang
,
M. L. Che
,
W. Liang
,
Y. F. Hu
,
W. H. Kuang
, and
H. M. Wang

Abstract

Sensible heat flux (H), latent heat flux (LE), and net radiation (NR) are important surface energy components that directly influence climate systems. In this study, the changes in the surface energy and their contributions from global climate change and/or land-cover change over eastern China during the past nearly 30 years were investigated and assessed using a process-based land surface model [the Ecosystem–Atmosphere Simulation Scheme (EASS)]. The modeled results show that climate change contributed more to the changes of land surface energy fluxes than land-cover change, with their contribution ratio reaching 4:1 or even higher. Annual average temperature increased before 2000 and reversed thereafter; annual total precipitation continually decreased, and incident solar radiation continually increased over the past nearly 30 years. These climatic changes could lead to increased NR, H, and LE, assuming land cover remained unchanged during the past nearly 30 years. Among these meteorological variables, at spatial distribution, the incident solar radiation has the greatest effect on land surface energy exchange. The impacts of land-cover change on the seasonal variations in land surface heat fluxes between the four periods were large, especially for H. The changes in the regional energy fluxes resulting from different land-cover type conversions varied greatly. The conversion from farmland to evergreen coniferous forests had the greatest influence on land surface energy exchange, leading to a decrease in H by 19.39% and an increase in LE and NR by 7.44% and 2.74%, respectively. The results of this study can provide a basis and reference for climate change adaptation.

Full access
W. J. Gutowski Jr.
,
P. A. Ullrich
,
A. Hall
,
L. R. Leung
,
T. A. O’Brien
,
C. M. Patricola
,
R. W. Arritt
,
M. S. Bukovsky
,
K. V. Calvin
,
Z. Feng
,
A. D. Jones
,
G. J. Kooperman
,
E. Monier
,
M. S. Pritchard
,
S. C. Pryor
,
Y. Qian
,
A. M. Rhoades
,
A. F. Roberts
,
K. Sakaguchi
,
N. Urban
, and
C. Zarzycki
Full access
W. J. Gutowski Jr
,
P. A. Ullrich
,
A. Hall
,
L. R. Leung
,
T. A. O’Brien
,
C. M. Patricola
,
R. W. Arritt
,
M. S. Bukovsky
,
K. V. Calvin
,
Z. Feng
,
A. D. Jones
,
G. J. Kooperman
,
E. Monier
,
M. S. Pritchard
,
S. C. Pryor
,
Y. Qian
,
A. M. Rhoades
,
A. F. Roberts
,
K. Sakaguchi
,
N. Urban
, and
C. Zarzycki

ABSTRACT

Regional climate modeling addresses our need to understand and simulate climatic processes and phenomena unresolved in global models. This paper highlights examples of current approaches to and innovative uses of regional climate modeling that deepen understanding of the climate system. High-resolution models are generally more skillful in simulating extremes, such as heavy precipitation, strong winds, and severe storms. In addition, research has shown that fine-scale features such as mountains, coastlines, lakes, irrigation, land use, and urban heat islands can substantially influence a region’s climate and its response to changing forcings. Regional climate simulations explicitly simulating convection are now being performed, providing an opportunity to illuminate new physical behavior that previously was represented by parameterizations with large uncertainties. Regional and global models are both advancing toward higher resolution, as computational capacity increases. However, the resolution and ensemble size necessary to produce a sufficient statistical sample of these processes in global models has proven too costly for contemporary supercomputing systems. Regional climate models are thus indispensable tools that complement global models for understanding physical processes governing regional climate variability and change. The deeper understanding of regional climate processes also benefits stakeholders and policymakers who need physically robust, high-resolution climate information to guide societal responses to changing climate. Key scientific questions that will continue to require regional climate models, and opportunities are emerging for addressing those questions.

Free access
Tim Li
,
Abdallah Abida
,
Laura S. Aldeco
,
Eric J. Alfaro
,
Lincoln M. Alves
,
Jorge A. Amador
,
B. Andrade
,
Julian Baez
,
M. Yu. Bardin
,
Endalkachew Bekele
,
Eric Broedel
,
Brandon Bukunt
,
Blanca Calderón
,
Jayaka D. Campbell
,
Diego A. Campos Diaz
,
Gilma Carvajal
,
Elise Chandler
,
Vincent. Y. S. Cheng
,
Chulwoon Choi
,
Leonardo A. Clarke
,
Kris Correa
,
Felipe Costa
,
A. P. Cunha
,
Mesut Demircan
,
R. Dhurmea
,
Eliecer A. Díaz
,
M. ElKharrim
,
Bantwale D. Enyew
,
Jhan C. Espinoza
,
Amin Fazl-Kazem
,
Nava Fedaeff
,
Z. Feng
,
Chris Fenimore
,
S. D. Francis
,
Karin Gleason
,
Charles “Chip” P. Guard
,
Indra Gustari
,
S. Hagos
,
Richard R. Heim Jr.
,
Rafael Hernández
,
Hugo G. Hidalgo
,
J. A. Ijampy
,
Annie C. Joseph
,
Guillaume Jumaux
,
Khadija Kabidi
,
Johannes W. Kaiser
,
Pierre-Honore Kamsu-Tamo
,
John Kennedy
,
Valentina Khan
,
Mai Van Khiem
,
Khatuna Kokosadze
,
Natalia N. Korshunova
,
Andries C. Kruger
,
Nato Kutaladze
,
L. Labbé
,
Mónika Lakatos
,
Hoang Phuc Lam
,
Mark A. Lander
,
Waldo Lavado-Casimiro
,
T. C. Lee
,
Kinson H. Y. Leung
,
Andrew D. Magee
,
Jostein Mamen
,
José A. Marengo
,
Dora Marín
,
Charlotte McBride
,
Lia Megrelidze
,
Noelia Misevicius
,
Y. Mochizuki
,
Aurel Moise
,
Jorge Molina-Carpio
,
Natali Mora
,
Awatif E. Mostafa
,
uan José Nieto
,
Lamjav Oyunjargal
,
Reynaldo Pascual Ramírez
,
Maria Asuncion Pastor Saavedra
,
Uwe Pfeifroth
,
David Phillips
,
Madhavan Rajeevan
,
Andrea M. Ramos
,
Jayashree V. Revadekar
,
Miliaritiana Robjhon
,
Ernesto Rodriguez Camino
,
Esteban Rodriguez Guisado
,
Josyane Ronchail
,
Benjamin Rösner
,
Roberto Salinas
,
Amal Sayouri
,
Carl J. Schreck III
,
Serhat Sensoy
,
A. Shimpo
,
Fatou Sima
,
Adam Smith
,
Jacqueline Spence
,
Sandra Spillane
,
Arne Spitzer
,
A. K. Srivastava
,
José L. Stella
,
Kimberly A. Stephenson
,
Tannecia S. Stephenson
,
Michael A. Taylor
,
Wassila Thiaw
,
Skie Tobin
,
Dennis Todey
,
Katja Trachte
,
Adrian R. Trotman
,
Gerard van der Schrier
,
Cedric J. Van Meerbeeck
,
Ahad Vazifeh
,
José Vicencio Veloso
,
Wei Wang
,
Fei Xin
,
Peiqun Zhang
,
Zhiwei Zhu
, and
Jonas Zucule
Free access