Radar signatures of the urban effect on precipitation distribution: A case study for Atlanta, Georgia

Mote, Thomas L.; Lacke, Matthew C.; Shepherd, J. Marshall

doi:10.1029/2007gl031903

Cited by 152 publications

(117 citation statements)

References 25 publications

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“…Factors influencing urban induced precipitation included low level moisture, urban heat island intensity, and atmospheric instability. Using ground-based weather radar, Mote et al (2007) showed that urban induced rainfall resulted in a 30% increase in rainfall in eastern metropolitan Atlanta, relative to the western metropolitan area [19]. The effects of urban induced rainfall could be measured up to 80 km to the east of the center of Atlanta.…”

Section: Montgomerymentioning

confidence: 99%

Urbanization Effects on Watershed Hydrology and In-Stream Processes in the Southern United States

O’Driscoll

Clinton

Jefferson

et al. 2010

Water

349

219

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Abstract:The southern United States is characterized by a humid, subtropical climate and consists of 16 states (Texas, Oklahoma, Arkansas, Louisiana, Mississippi, Tennessee, Kentucky, Alabama, Florida, Georgia, South Carolina, North Carolina, Virginia, West Virginia, Delaware, and Maryland) and Washington DC. Currently this region is experiencing the largest net population growth in the U.S. Over the last century, the expansion of large urban centers and impervious area in the region has altered the hydrologic cycle. This review synthesizes regional research that shows how watershed hydrology, groundwater recharge, stream geomorphology, climate, biogeochemistry, and stream ecology have been affected by urbanization and the expansion of watershed impervious area.

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Section: Montgomerymentioning

confidence: 99%

Urbanization Effects on Watershed Hydrology and In-Stream Processes in the Southern United States

O’Driscoll

Clinton

Jefferson

et al. 2010

Water

349

219

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“…Results from METROMEX suggest that the urban effects lead to 5-25% increased precipitation, particularly 50-75 km downwind of the urban center during the summer months (Changnon et al, 1991). There is increasing evidence that urbanization and changes in urban-rural boundaries can have a significant feedback on the spatiotemporal patterns of precipitation (Shepherd et al, 2002;Shepherd and Burian, 2003;Niyogi et al, 2006;Mote et al, 2007;Lei et al, 2008). Cotton and Pielke (2007, Chapter 5;Pielke et al, 2007, Section 7) summarize numerous studies as to how urbanization alters rainfall patterns as a result of mesoscale circulations and through changes in convective available potential energy (CAPE).…”

Section: Introductionmentioning

confidence: 99%

Urbanization signature in the observed heavy rainfall climatology over India

Kishtawal

Niyogi

Tewari

et al. 2009

Intl Journal of Climatology

Self Cite

311

176

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ABSTRACT:We assess the urbanization impacts on the heavy rainfall climatology during the Indian summer monsoon. While a number of studies have identified the impact of urbanization on local precipitation, a large-scale assessment has been lacking. This relation between urbanization and Indian monsoon rainfall changes is investigated by analyzing in situ and satellite-based precipitation and population datasets. Using a long-term daily rainfall dataset and high-resolution gridded analysis of human population, this study showed a significantly increasing trend in the frequency of heavy rainfall climatology over urban regions of India during the monsoon season. Urban regions experience less occurrences of light rainfall and significantly higher occurrences of intense precipitation compared to nonurban regions. Very heavy and extreme rainfall events showed increased trends over both urban and rural areas, but the trends over urban areas were larger and statistically more significant. Our analysis suggests that there is adequate statistical basis to conclude that the observed increasing trend in the frequency of heavy rainfall events over Indian monsoon region is more likely to be over regions where the pace of urbanization is faster. Moreover, rainfall measurements from satellites also indicate that urban areas are more (less) likely to experience heavier (lighter) precipitation rates compared to those in nonurban areas. While the mechanisms causing this enhancement in rainfall remain to be studied, the results provide the evidence that the increase in the heavy rainfall climatology over the Indian monsoon region is a signature of urban-induced rainfall anomaly.

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“…In many cases, UHI can increase the rainfall in the vicinity of the cities. A number of studies have found an increase in rainfall in regions downwind of urban areas, with increases as high as 25 % in some cases (Shepherd et al, 2002;Mote et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Urbanization and climate change impacts on future urban flooding in Can Tho city, Vietnam

Huong¹,

Pathirana

2013

Hydrol. Earth Syst. Sci.

496

240

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Abstract. Urban development increases flood risk in cities due to local changes in hydrological and hydrometeorological conditions that increase flood hazard, as well as to urban concentrations that increase the vulnerability. The relationship between the increasing urban runoff and flooding due to increased imperviousness is better perceived than that between the cyclic impact of urban growth and the urban rainfall via microclimatic changes. The large-scale, global impacts due to climate variability and change could compound these risks. We present the case of a typical third world city -Can Tho (the biggest city in Mekong River Delta, Vietnam) -faced with multiple future challenges, namely: (i) the likely effect of climate change-driven sea level rise, (ii) an expected increase of river runoff due to climate change as estimated by the Vietnamese government, (iii) increased urban runoff driven by imperviousness, and (iv) enhancement of extreme rainfall due to urban growth-driven, microclimatic change (urban heat islands). A set of model simulations were used to construct future scenarios, combining these influences. Urban growth of the city was projected up to year 2100 based on historical growth patterns, using a land use simulation model (Dinamica EGO). A dynamic limited-area atmospheric model (WRF), coupled with a detailed land surface model with vegetation parameterization (Noah LSM), was employed in controlled numerical experiments to estimate the anticipated changes in extreme rainfall patterns due to urban heat island effect. Finally, a 1-D/2-D coupled urbandrainage/flooding model (SWMM-Brezo) was used to simulate storm-sewer surcharge and surface inundation to establish the increase in the flood hazard resulting from the changes. The results show that under the combined scenario of significant change in river level (due to climate-driven sea level rise and increase of flow in the Mekong) and "business as usual" urbanization, the flooding of Can Tho could increase significantly. The worst case may occur if a sea level rise of 100 cm and the flow from upstream happen together with high-development scenarios. The relative contribution of causes of flooding are significantly different at various locations; therefore, detailed research on adaptation are necessary for future investments to be effective.

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Radar signatures of the urban effect on precipitation distribution: A case study for Atlanta, Georgia

Cited by 152 publications

References 25 publications

Urbanization Effects on Watershed Hydrology and In-Stream Processes in the Southern United States

Urbanization Effects on Watershed Hydrology and In-Stream Processes in the Southern United States

Urbanization signature in the observed heavy rainfall climatology over India

Urbanization and climate change impacts on future urban flooding in Can Tho city, Vietnam

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