Recent California climate variability: spatial and temporal patterns in temperature trends

LaDochy, Steve; Medina, Richard; Patzert, William C.

doi:10.3354/cr033159

Cited by 86 publications

(84 citation statements)

References 20 publications

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“…Data such as these reveal an increase in the minimum temperatures that is greater than the increase in the maximum temperatures. Similar results were also observed by other researchers (JUNG et al, 2002;LADOCHY et al, 2007;VOSE et al, 2005), showing that although there is a high regional variability in the increase of temperature, the same tendency of an increase is evident in different parts of the globe.…”

Section: Air Temperature Changesupporting

confidence: 79%

Extreme temperature trends in the equatorial region of Brazil: Case study of the state of Ceará

et al. 2012

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-Despite uncertainties as to the real causes, there is a large amount of evidence of climatic change on Earth. With the objective of investigating changes in extreme air temperatures, as well as the local effects of these changes, eight data sets, collected throughout the State of Ceará in Brazil, were analyzed. Four series of data were obtained from the semi-arid region, three from the coastal zone, and one from a mountainous region. To quantify the changes that occurred during the study period, variations in maximum and minimum temperatures were calculated in relation to the mean of each data series. The annual rates of temperature increase were estimated from the angular coefficients of the best-fit lines. The results showed that although there are differences in trends between stations, there was a systematic increase in the maximum and minimum temperature in the nineties, which was especially evident in the following decade. The highest rates of increase were recorded for the minimum temperatures (from 9.0 to 8.3 °C per century) for the stations at Guaramiranga and Crateús respectively. These data provide evidence for a greater retention of energy in the form of sensible heat during the night, possibly due to a more difficult energy exchange between the surface and the atmosphere.Key words -Climatic changes. Global warming. Air temperature.Resumo -Apesar das incertezas sobre as verdadeiras causas, há uma grande quantidade de evidências de mudanças climáticas na Terra. Com o objetivo de investigar as mudanças em temperaturas extremas do ar, bem como os efeitos locais das mudanças, oito conjuntos de dados coletados ao longo do Estado do Ceará, Brasil, foram analisados. Quatro série de dados foram obtidas a partir da região semi-árida, três da zona costeira e uma de uma região montanhosa. Para quantificar as mudanças que ocorreram durante o período do estudo, as variações nas temperaturas máximas e mínimas foram calculadas em relação à média de cada série. As taxas anuais de aumento de temperatura foram estimadas pelos coeficientes angulares das linhas de melhor ajuste. Os resultados mostraram que, embora haja diferenças nas tendências entre as estações, ocorreu um aumento sistemático da temperatura máxima e mínima, que foi especialmente evidente na década seguinte, dos anos 90. As maiores taxas de crescimento foram registradas para as temperaturas mínimas (de 9,0 a 8,3 °C por século) para as estações de Guaramiranga e Crateús, respectivamente. Estes dados fornecem evidências para a maior retenção de energia na forma de calor sensível durante a noite possivelmente devido a uma troca de energia mais difícil, entre a superfície e a atmosfera.Palavras-chave -Mudanças climáticas. Aquecimento global. Temperatura atmosférica.

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Section: Air Temperature Changesupporting

confidence: 79%

Extreme temperature trends in the equatorial region of Brazil: Case study of the state of Ceará

et al. 2012

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“…For instance, Poanes melane was positively impacted by warmer minimum spring temperatures, but negatively impacted by warmer maximum spring temperatures. Given that maximum and minimum temperatures are changing at differing rates [22,23], this pattern demonstrates the importance of considering both variables in explorations of how climate change may impact organisms, as opposed to basing predictions solely on average temperatures.…”

Section: Discussionmentioning

confidence: 99%

Species with more volatile population dynamics are differentially impacted by weather

et al. 2015

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Climatic variation has been invoked as an explanation of population dynamics for a variety of taxa. Much work investigating the link between climatic forcings and population fluctuation uses single-taxon case studies. Here, we conduct comparative analyses of a multi-decadal dataset describing population dynamics of 50 co-occurring butterfly species at 10 sites in Northern California. Specifically, we explore the potential commonality of response to weather among species that encompass a gradient of population dynamics via a hierarchical Bayesian modelling framework. Results of this analysis demonstrate that certain weather conditions impact volatile, or irruptive, species differently as compared with relatively stable species. Notably, precipitation-related variables, including indices of the El Niñ o Southern Oscillation, have a more pronounced impact on the most volatile species. We hypothesize that these variables influence vegetation resource availability, and thus indirectly influence population dynamics of volatile taxa. As one of the first studies to show a common influence of weather among taxa with similar population dynamics, the results presented here suggest new lines of research in the field of biotic-abiotic interactions.

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“…LaDochy et al (2007) suggest that some of these differences may be due to urbanization, and question the notion of uniform climatic controls over the climatic divisions. My study area falls near and over the western edge of the NE interior basins division.…”

Section: Air Temperature Trendsmentioning

confidence: 99%

“…Several studies have shown that ocean circulation and temperature patterns, particularly the Pacific decadal oscillation (PDO) and El Niño/southern oscillation (ENSO) are statistically related to warming trends in the western USA (Arhonditsis et al 2004;Mantua et al 1997;LaDochy et al 2007), the earlier onset of snowmelt runoff (Cayan et al 2001;Dettinger and Cayan 1995;Stewart et al 2005), the shift in precipitation from snow to rain (Knowles et al 2006;Regonda et al 2005), declining snowpacks Hamlet et al 2005), and earlier onset of spring (Cayan et al 2001). To examine the relationship between these large-scale climatic Adjusted P values were calculated from the pruned data set, to account for serial correlation (see Section 2.1) descriptors and the dependent climate variables in the Tahoe basin, I used OLS regression to test (1) deseasonalized monthly average T max and T min air temperature at Tahoe City, (2) water year percent precipitation as snow; (3) SMPT, adjusted for total annual snowfall, and averaged over the five basin streams; and (4) monthly average of deseasonalized volume-averaged lake temperature.…”

Section: Influence Of the Pacific Decadal Oscillation And El Niño/soumentioning

confidence: 99%

Climate change in the Tahoe basin: regional trends, impacts and drivers

Coats

2010

Climatic Change

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The purpose of this study was to quantify the decadal-scale time trends in air temperature, precipitation phase and intensity, spring snowmelt timing, and lake temperature in the Tahoe basin, and to relate the trends to large-scale regional climatic trends in the western USA. Temperature data for six long-term weather stations in the Tahoe region were analyzed for trends in annual and monthly means of maximum and minimum daily temperature. Precipitation data at Tahoe City were analyzed for trends in phase (rain versus snow), decadal standard deviation, and intensity of rainfall. Daily streamflow data for nine gaging stations in and around the Tahoe basin were examined for trends in snowmelt timing, by two methods, and an existing record for the temperature of Lake Tahoe was updated. The results for the Tahoe basin, which contrast somewhat with the surrounding region, indicate strong upward trends in air temperature, a shift from snow to rain, a shift in snowmelt timing to earlier dates, increased rainfall intensity, increased interannual variability, and continued increase in the temperature of Lake Tahoe. Two hypotheses are suggested that may explain why the basin could be warming faster than surrounding regions. Continued warming in the Tahoe basin has important implications for efforts to manage biodiversity and maintain clarity of the lake.

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Recent California climate variability: spatial and temporal patterns in temperature trends

Cited by 86 publications

References 20 publications

Extreme temperature trends in the equatorial region of Brazil: Case study of the state of Ceará

Extreme temperature trends in the equatorial region of Brazil: Case study of the state of Ceará

Species with more volatile population dynamics are differentially impacted by weather

Climate change in the Tahoe basin: regional trends, impacts and drivers

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