Trends in high-frequency climate variability in the twentieth century

Karl, Thomas R.; Knight, Richard W.; Plummer, Neil

doi:10.1038/377217a0

Cited by 618 publications

(462 citation statements)

References 14 publications

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“…Moreover, changes in the probability distribution of daily rainfall have an effect on runoff generation (MartinVide 2004), potentially either reinforcing or counteracting the impact of climate change on the availability of water resources. Existing studies in this regard (i.e., Karl et al 1995) report a global tendency during the 20th century toward an increase of the frequency of extreme drought and flood events as a consequence of the concentration of precipitation within a smaller number of rainfall events; however, these generalized results hide a large degree of spatial and seasonal variability (e.g., Groissman et al 1999;Brunneti et al 2001;González-Hidalgo et al 2003). The above observations demonstrate the necessity of additional research at varied geographical sites to fully understand spatial variability in the impacts of climate change, for which there remain numerous gaps in our knowledge.…”

Section: Introductionmentioning

confidence: 88%

Daily precipitation intensity projected for the 21st century: seasonal changes over the Pyrenees

López‐Moreno

Beniston²

2008

Theor Appl Climatol

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A set of climate parameters (mean precipitation, number of wet days, daily intensity, and number of days with more than 50 mm rainfall) and a quantile-based approach are used to assess the expected changes in daily precipitation characteristics over the Pyrenees predicted for the 21st century using a set of regional climate models (RCMs). The features of the geographic location and topography of the Pyrenees imply that the climate of the region is highly complex. The results point toward an intensification of extremes, with a generalized tendency toward increasing drought periods, an increasing trend in daily intensity, and an increasing contribution of intense events to total precipitation; however, the results are subject to substantial spatial and seasonal variability, mainly related to the Atlantic-Mediterranean gradient and the longitudinal disposition of the main axis of the range.

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Section: Introductionmentioning

confidence: 88%

Daily precipitation intensity projected for the 21st century: seasonal changes over the Pyrenees

López‐Moreno

Beniston²

2008

Theor Appl Climatol

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“…From each of the five series of daily N-day changes we then calculate monthly averages. According to Karl et al [1995], temperature variability defined in this way as the mean of a series of values defined by the absolute value of the difference in temperature anomalies between two adjacent discrete time periods, is less prone to confounding the influence of highand low-frequency variability than are the more commonly used measures of variability, such as the standard deviation.…”

Section: Datamentioning

confidence: 99%

Day‐to‐day temperature variability trends in 160‐ to 275‐year‐long European instrumental records

Moberg¹,

Jones²,

Barriendos³

et al. 2000

J. Geophys. Res.

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Abstract. Day-to-day temperature variability is investigated in eight European series of daily mean temperatures beginning between 1722 and 183 3. Eight statistical measures of day-today temperature variability are compared. The intramonthly standard deviation of daily temperature anomalies is found to be a good measure. The absolute change in temperature anomaly from one day to the next is sensitive to changes in observational procedures and is suggested as a diagnostic tool for identification of inhomogeneities in instrumental temperature series. Because many changes in observational procedures have taken place, quantitative estimates of trends in day-to-day variability, based on all series, could only be calculated for 1880-1998. A trend analysis over this period indicates an increase by 5% in southwest Europe, 0 to -5% change in the northwest, and a decrease by 5 to 10% in northeast Europe. On a longer time perspective, day-to-day temperature variability in winter, spring, and autumn in northern Europe has decreased over the last 200-250 years. The frequency of extremely cold •vinter days in northern Europe •vas lower in the twentieth century than in the eighteenth and nineteenth centuries. Day-to-day temperature variability in •vinter in northern Europe was negatively correlated with a North Atlantic Oscillation index in the period 1826-1997, but some other factor must also have contributed to the long-term variability decrease. More long daily temperature series, and development ofhomogenization methods for such data, are needed for an improved knowledge of long-term changes in day-to-day temperature variability.

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“…Trend in light precipitation was previously reported for limited countries. Karl et al (1995) reported that the proportion derived from lighter precipitation (trace to 2.5 mm day −1 ) increased in the U.S.A. On the other hand, decreasing trends in lighter precipitation classes were observed in Japan (Fujibe et al 2005) and China (Liu et al 2005;Liu et al 2010). Since Bangladesh is located in the tropical monsoon region, large-scale environment and precipitation-producing system in and around Bangladesh are very different from the other countries mentioned above.…”

Section: Indexmentioning

confidence: 99%

Trends in Precipitation Characteristics in Bangladesh from 1950 to 2008

Endo

Matsumoto

Hayashi

et al. 2015

SOLA

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We analyzed trends in precipitation characteristics at 12 weather stations in Bangladesh using data from 1950 to 2008 and a non-parametric Mann-Kendall's tau test. It was found that the annual precipitation amount and the number of wet days tended to increase at almost all the stations. The number of days with weak precipitation (< 3 mm) showed increasing tendency; the number of days with daily precipitation exceeding 10 mm increased at three stations; and the number of days with daily precipitation exceeding 20 mm increased at two stations. Heavy rainfall index showed no clear trend, and was dominated by inter-annual and/or decadal variations. During the pre-monsoon season, seasonal precipitation amount and the number of wet days increased, and the number of days with weak precipitation (< 3 mm) also increased. Changes in the monsoon and post-monsoon seasons were insignificant.

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Trends in high-frequency climate variability in the twentieth century

Cited by 618 publications

References 14 publications

Daily precipitation intensity projected for the 21st century: seasonal changes over the Pyrenees

Daily precipitation intensity projected for the 21st century: seasonal changes over the Pyrenees

Day‐to‐day temperature variability trends in 160‐ to 275‐year‐long European instrumental records

Trends in Precipitation Characteristics in Bangladesh from 1950 to 2008

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