TITLE

Exploring the Sensitivity of the Australian Climate to Regional Land-Cover-Change Scenarios under Increasing CO2 Concentrations and Warmer Temperatures

AUTHOR(S)
Narisma, G. T.; Pitman, A. J.
PUB. DATE
January 2006
SOURCE
Earth Interactions;2006, Vol. 10 Issue 1, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The potential role of the impacts of land-cover changes (LCCs) in the Australian climate is investigated within the context of increasing CO2 concentrations and temperature. Specifically, it is explored if possible scenarios for LCC can moderate or amplify CO2-induced changes in climate over Australia. The January climate of Australia is simulated under three different land-cover-change scenarios using a high-resolution regional climate model. The land-cover-change scenarios include a steady-state land cover that is equivalent to current land cover, a low-reforestation scenario that recovers approximately 25% of the trees replaced by grasslands within the last 200 yr, and a high-reforestation scenario that recovers at least 75% of the deforested regions. The model was driven by boundary conditions taken from transitory climate simulations from a general circulation model that included two climate scenarios based on two projected scenarios of CO2 concentration increase. The results show that reforestation has the potential to reduce the projected increase in Australian temperatures in 2050 and 2100 by as much as 40% and 20%, respectively. This cooling effect, however, is highly localized and occurs only in regions of reforestation. The results therefore hint that the potential of reforestation to moderate the impact of global warming may be significantly limited by the spatial scale of reforestation. In terms of deforestation, results show that any future land clearing can exacerbate the projected warming in certain regions of Australia. Carbon-related variables are also analyzed and results show that changes in net CO2 flux may be influenced more by soil respiration than by photosynthesis. The results herein encourage studies on the inclusion of land-cover-change scenarios in future climate change projection simulations of the Australian climate.
ACCESSION #
21923179

 

Related Articles

  • Twentieth-century trends in the thermal growing season in the Greater Baltic Area. Linderholm, Hans W.; Walther, Alexander; Deliang Chen // Climatic Change;Apr2008, Vol. 87 Issue 3/4, p405 

    Phenological data have shown an increase of ca. 10 days in European growing season length in the latter part of the twentieth century. In general, these changes have been associated with global warming. Here we present a study of thermal growing season (GS) trends in the Greater Baltic Area,...

  • Externally Forced and Internally Generated Decadal Climate Variability Associated with the Interdecadal Pacific Oscillation. Meehl, Gerald A.; Hu, Aixue; Arblaster, Julie M.; Fasullo, John; Trenberth, Kevin E. // Journal of Climate;Sep2013, Vol. 26 Issue 18, p7298 

    Globally averaged surface air temperatures in some decades show rapid increases (accelerated warming decades), and in other decades there is no warming trend (hiatus decades). A previous study showed that the net energy imbalance at the top of the atmosphere of about 1 W m−2 is associated...

  • 'Alternative futures' of the Okavango Delta simulated by a suite of global climate and hydro-ecological models. Wolski, P.; Murray-Hudson, M. // Water SA;Oct2008, Vol. 34 Issue 5, p605 

    The natural resources of the Okavango Delta, a large wetland in semi-arid Botswana, form the basis of livelihoods of the local population and support economically important high-end tourism. The hydro-ecological system is dynamic at various time scales, responding to climate variability, and...

  • Climate change. Stranks, Jeremy // A-Z of the Environment;2008, p71 

    Information about climate change is presented. Considering its environment treat to the planet, climate change is referred to the average weather experienced over a long period of time, including temperature, wind and rainfall patterns. Moreover, implications of climate change is also mentioned,...

  • Global Warming: Guide to Critical Analysis.  // Points of View: Global Warming;6/30/2019, p4 

    This article offers a critical guide to the controversial issue of global warming. The article discusses criteria in understanding the issue, such as distinguishing between fact and opinion and recognizing point and counterpoint arguments. Also presented are exercises that help the reader...

  • Variability of Upper Pacific Ocean Overturning in a Coupled Climate Model. Merryfield, William J.; Boer, George J. // Journal of Climate;Mar2005, Vol. 18 Issue 5, p666 

    Variability of subtropical cell (STC) overturning in the upper Pacific Ocean is examined in a coupled climate model in light of large observed changes in STC transport. In a 1000-yr control run, modeled STC variations are smaller than observed, but correlate in a similar way with low-frequency...

  • Climate evidence finds us guilty as charged. Pearce, Fred // New Scientist;6/11/2006, Vol. 186 Issue 2503, p17 

    The article presents a study on the extent and pattern of the rise in ocean temperatures. The oceans eventually absorb 84 percent of the Earth's extra heat and the distribution of that heat closely matches what climate models predict would be the effect of human activity. The human component...

  • Interactive comment on "How unusual was autumn 2006 in Europe?" by G. J. van Oldenborgh. Van Oldenborgh, G. J. // Climate of the Past Discussions;2007 Supplement, Vol. 3, pS417 

    The article presents a response by G. J. van Oldenborgh to a comment on the paper "How Unusual Was Autumn 2006 in Europe" that was published in the previous issue of the journal. The author says that the approximation approach assumes a stationary climate. It also assumes that temperatures are...

  • Summertime land-sea thermal contrast and atmospheric circulation over East Asia in a warming climate-Part I: Past changes and future projections. Kamae, Youichi; Watanabe, Masahiro; Kimoto, Masahide; Shiogama, Hideo // Climate Dynamics;Nov2014, Vol. 43 Issue 9/10, p2553 

    Land-sea surface air temperature (SAT) contrast, an index of tropospheric thermodynamic structure and dynamical circulation, has shown a significant increase in recent decades over East Asia during the boreal summer. In Part I of this two-part paper, observational data and the results of...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics