Man-Made Climatic Changes

Landsberg, H. E.

doi:10.1007/978-94-010-1729-9_15

Cited by 76 publications

(48 citation statements)

References 162 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The first is located where Er Rosieres Dam is constructed, while the other is a coastal station. The construction of a very large reservoir has a measurable influence on the immediate vicinity (lake effect), including reduction in temperature extremes, an increase in humidity and small-scale circulations of the land-and lake-breeze type (Landsberg 1970). The influence of the sea moderates the MAX reached in both the summer and the winter (Lough 1995), given that rain falls in Port Sudan during the cold part of the year.…”

Section: Wet Seasonmentioning

confidence: 99%

Trends in Intra- and Inter-Annual Temperature Variabilities Across Sudan

Elagib

2010

AMBIO

View full text Add to dashboard Cite

Four mean temperature variables, namely maximum (MAX), minimum (MIN), mean (MEAN) and diurnal temperature range (DTR), were considered for 14 selected observational stations throughout Sudan. The objectives were to investigate the seasonal and annual regimes, the seasonal and annual trends, the intra-annual variability (IAV) by the coefficient of variation (CV), and the interrelationships between the temperature variables and percent of possible sunshine. A mounting evidence of daytime and nighttime warming since the 1940s until 2005 is presented. The exception is the dry season which is dominated by daytime cooling attributable to the damping effect of dust haze/storms. Apparently, the progressive drought across inland locations has raised the MAXs, and to a lesser extent the MINs, of the wet season over those for the hot season. Accordingly, maximum rates of 0.451 and 0.336°C decade -1 were found for the nighttime and daytime temperatures, respectively. The extreme eastern and western locations have been frequently dominated by the warmest trend rates obtained nationwide. The prevalence of significant decreases (increases) of DTR is more apparent in the dry, hot and annual series (wet series). Depending on the temperature variable under consideration, many stations possessed significant trends toward either increased or decreased variability of the within-year monthly values, i.e. IAV. The correlation between the time series of annual CV and extreme values for each of the four temperature variables shows generally that warmer climate in Sudan is associated with higher intra-annual temperature variability and vise versa, i.e. the CV is directly correlated with the highest value within the year, but inversely correlated with the lowest one. The findings of this investigation also indicate that the DTR is directly related to percent of possible sunshine, but the relationship of the latter parameter is not so clear with MAX, MIN and MEAN.

show abstract

Section: Wet Seasonmentioning

confidence: 99%

Trends in Intra- and Inter-Annual Temperature Variabilities Across Sudan

Elagib

2010

AMBIO

View full text Add to dashboard Cite

show abstract

“…The fact that rainfall very often follows thunderstorm activity has also been explored from various viewpoints. The earliest studies that corroborate the association of rainfall with frequencies of thunderstorms were those by Landsberg (1971) and Freier (1978). Their results showed that low rainfall regimes are well associated with low frequencies of thunderstorms.…”

Section: Introductionmentioning

confidence: 96%

Spatial and temporal analysis of thunderstorm and rainfall activity over India

Bhardwaj

Singh

2018

Atm

View full text Add to dashboard Cite

RESUMENLas tormentas eléctricas son uno de los fenómenos meteorológicos severos de mesoescala más devastadores, y desempeñan un papel relevante en la incidencia de precipitación en una región. Por ello, en el presente estudio se trató de identificar la relación entre días de tormenta (Thn), días de lluvia (Thr) y cantidad de la precipitación (Trr) en 294 estaciones meteorológicas distribuidas a lo largo de la India por medio de datos (normales climatológicas) publicados por el Departamento Meteorológico de la India (IMD, por sus siglas en inglés) para cuatro periodos: 1951-1980, 1961-1990, 1971-2000 y 1981-2010. El análisis mostró la existencia de una reducción drástica en la frecuencia de Thn, mientras que Thr y Trr mostraron un descenso leve. Se observó una correlación significativa entre las tres variables. El análisis mensual mostró un pico doble en la ocurrencia de Thn y un pico sencillo en la precipitación; sin embargo, se advirtió un intervalo de un mes entre la presentación de estos picos. Estos resultados demuestran que el monzón de verano de la India afecta de manera significativa la actividad de las tormentas eléctricas. El análisis estacional sugiere que Thn, Thr y Trr alcanzaron sus máximos durante la estación del monzón y sus mínimos durante el invierno. Por otra parte, se ha demostrado la existencia de una relación negativa entre Thn y Thr, y Thn y Trr durante el monzón, anomalía que puede deberse a la temperatura decreciente en la India durante dicha estación. Adicionalmente, el patrón espacial mensual y estacional de la ocurrencia de Thn, Thr y Trr permanece casi inalterado en el periodo . No obstante, se observó una disminución drástica en la frecuencia de Thn en los periodos subsiguientes en todo el país. De manera similar, se percibió una leve disminución en la frecuencia de Thr y Trr sobre la India, excepto en el noreste, que exhibe una tendencia al alza en la precipitación. Se ha encontrado que el índice Thn/Thr (R) alcanza su máximo en la temporada previa al monzón, mientras que el índice Trr/Thn alcanza su máximo durante la temporada del monzón. El análisis regional de Thn, Thr y Trr muestra una amplia gama de variaciones en la ocurrencia de estos patrones a lo largo del año. Se considera que los resultados de este estudio serán de utilidad para los meteorólogos, pilotos aviadores, agricultores y planificadores. ABSTRACTThunderstorms are one of the most devastating mesoscale severe weather phenomena, which play an important role in the occurrence of rainfall activity over a region. Therefore, in the present study an attempt has been made to identify the relationship between thunderstorm days (Thn), rainy days (Thr) and rainfall amounts (Trr) for 294 meteorological stations spreading over India, by means of published data (climatological normals) from the India Meteorological Department (IMD) for four periods, 1951-1980, 1961-1990, 1971-2000, and 1981-2010. The analysis has revealed a sharp decrease in the frequency of Thn, while Thr and Trr showed a slight decline. A significant correlat...

show abstract

“…Early investigations (Changnon, 1968;Landsberg, 1970;Huff and Changnon, 1972) noted evidence of warm seasonal rainfall increases of 9-17% downwind of major cities. The Metropolitan Meteorological Experiment (METROMEX) was a landmark study that took place in the 1970s in the United States Huff, 1986) to further investigate modification of rainfall by the urban environment.…”

Section: Introductionmentioning

confidence: 99%

Urbanization signature in the observed heavy rainfall climatology over India

Kishtawal

Niyogi

Tewari

et al. 2009

Intl Journal of Climatology

308

176

View full text Add to dashboard Cite

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.

show abstract

Man-Made Climatic Changes

Cited by 76 publications

References 162 publications

Trends in Intra- and Inter-Annual Temperature Variabilities Across Sudan

Trends in Intra- and Inter-Annual Temperature Variabilities Across Sudan

Spatial and temporal analysis of thunderstorm and rainfall activity over India

Urbanization signature in the observed heavy rainfall climatology over India

Contact Info

Product

Resources

About