Seasonal hydroclimatic impacts of Sun Corridor expansion

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Video in TIB AV-Portal: Seasonal hydroclimatic impacts of Sun Corridor expansion

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Seasonal hydroclimatic impacts of Sun Corridor expansion
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CC Attribution - NonCommercial - ShareAlike 3.0 Unported:
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2012
Language
English

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Abstract
Conversion of natural to urban land forms imparts influence on local and regional hydroclimate via modification of the surface energy and water balance, and consideration of such effects due to rapidly expanding megapolitan areas is necessary in light of the growing global share of urban inhabitants. Based on a suite of ensemble-based, multi-year simulations using the Weather Research and Forecasting (WRF) model, we quantify seasonally varying hydroclimatic impacts of the most rapidly expanding megapolitan area in the US: Arizona's Sun Corridor, centered upon the Greater Phoenix metropolitan area. Using a scenario-based urban expansion approach that accounts for the full range of Sun Corridor growth uncertainty through 2050, we show that built environment induced warming for the maximum development scenario is greatest during the summer season (regionally averaged warming over AZ exceeds 1 °C). Warming remains significant during the spring and fall seasons (regionally averaged warming over AZ approaches 0.9 °C during both seasons), and is least during the winter season (regionally averaged warming over AZ of 0.5 °C). Impacts from a minimum expansion scenario are reduced, with regionally averaged warming ranging between 0.1 and 0.3 °C for all seasons except winter, when no warming impacts are diagnosed. Integration of highly reflective cool roofs within the built environment, increasingly recognized as a cost-effective option intended to offset the warming influence of urban complexes, reduces urban-induced warming considerably. However, impacts on the hydrologic cycle are aggravated via enhanced evapotranspiration reduction, leading to a 4% total accumulated precipitation decrease relative to the non-adaptive maximum expansion scenario. Our results highlight potentially unintended consequences of this adaptation approach within rapidly expanding megapolitan areas, and emphasize the need for undeniably sustainable development paths that account for hydrologic impacts in addition to continued focus on mean temperature effects.

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in there and some quarter is the fastest-growing megapolitan her in the United States with rapid population
increase urban expansion and impacts
obviously the quality of life of many millions of people and so the sun in the unique position because it can guide growth in a sustainable fashion it can become a sort of an epitome of how smart
growth supposed the utilize projections of some quarter expansion of 2 2015 and essential and implemented these different scenarios of urban expansion located in toward numerical model that we repeated those simulations with the
maximum some quarter expansions in
any more constrained minimum extensions in in totality we conducted about a
half century of numerical experiments continental-scale numerical experiments with all the different adaptation scenarios and some the the projection and that's at 20 kilometers that's quite a bit of computing power yeah
this year I was fortunately confront Performance Computing Center was sold worldwide solvent also so it's it's like sort of imagine
podsols and computers price PCs
connected do you want a world to we are able to move on to the civil initial conditions and the other thing to
resolve uncertainties and all of us to
think of what would be the guy with the effects also climate the but ideology in parts the adaptation scenario that we implement basically utilizing the referred to as whole and raise the albedo
activity languages such that much less of the incoming solar radiation is sort of course previous research has found that the
including but in addition to mean surface
temperature average surface temperature impacts we also need to extend our analysis
to the hydrologic cycle what that means
is that basically you have rainfall that in a normal manner once it falls into the
natural land service it is held in a
similar way that a sponge holds moisture it is held
by the soil water column if you pave over
this entire geographical expands your now
forbidding the land surface to pack as a sponsor right on those and so by modifying the original
file hydra climate in this matter what you're doing is you're
basically decrease precipitation average over
the entire year of considerably what we're emphasizing here is that the it implements on large scale these FIL that you need to assess the tradeoffs
that extend beyond just have read temperature and in this particular case what we found is that
precipitation by implementing this adaptation of for the groups does in fact modify the hydrologic balance in
such a way as to decrease region consumer
I think we need to I our research before more
research and to try to highlight with
these additional possible annotations in there mitigation scenarios are and
then with additional research to better
understand
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