Increasing frequencies of warm and humid air masses over the conterminous United States from 1948 to 2005

Knight, David B.; Davis, Robert E.; Sheridan, Scott C.; Hondula, David M.; Sitka, Luke J.; Deaton, Michael L.; Lee, Temple R.; Gawtry, Stephen D.; Stenger, Philip J.; Mazzei, Francesco Giuseppe; Kenny, Barrett P.

doi:10.1029/2008gl033697

Cited by 30 publications

(32 citation statements)

References 20 publications

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“…Today, lake levels in northeastern South Dakota are relatively high. This is consistent with the modern low in magnetic susceptibility values, which in turn may be associated with decreased westerly wind strength and may be an expression of the clear observed trend towards higher frequencies of warm and moist air masses in the continental United States over the last half-century (Knight et al, 2008).…”

Section: A Schwalb Et Al / Quaternary Science Reviews 29 (2010) 232supporting

confidence: 68%

Centennial eolian cyclicity in the Great Plains, USA: a dominant climate pattern of wind transport over the past 4000 years?

Schwalb¹,

Dean²,

Fritz³

et al. 2010

Quaternary Science Reviews

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Section: A Schwalb Et Al / Quaternary Science Reviews 29 (2010) 232supporting

confidence: 68%

Centennial eolian cyclicity in the Great Plains, USA: a dominant climate pattern of wind transport over the past 4000 years?

Schwalb¹,

Dean²,

Fritz³

et al. 2010

Quaternary Science Reviews

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“…The significance was evaluated by parametric t-test, nonparametric Mann-Kendall test (Hipel and McLeod 1994), and by comparison with the 95% confidence interval (CI) of the slope estimated by bootstrap, in which regression analysis was repeated 10,000 times using random samples of the same size drawn from existing pairs of observations, with replacement, to generate a suite of regression parameter estimates (cf. Davis et al 2003b;Knight et al 2008). …”

Section: Methodsmentioning

confidence: 97%

Declining impacts of hot spells on mortality in the Czech Republic, 1986–2009: adaptation to climate change?

Kyselý

Plavcová

2011

Climatic Change

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The study examines temporal changes in mortality associated with spells of large positive temperature anomalies (hot spells) in extended summer season in the population of the Czech Republic (Central Europe) during 1986-2009. Declining trends in the mortality impacts are found in spite of rising temperature trends. The finding remains unchanged if possible confounding effects of within-season acclimatization to heat and the mortality displacement effect are taken into account. Recent positive socioeconomic development, following the collapse of communism in Central and Eastern Europe in 1989, and better public awareness of heat-related risks are likely the primary causes of the declining vulnerability. The results suggest that climate change may have relatively little influence on heat-related deaths, since changes in other factors that affect vulnerability of the population are dominant instead of temperature trends. It is essential to better understand the observed nonstationarity of the temperature-mortality relationship and the role of adaptation and its limits, both physiological and technological, and to address associated uncertainties in studies dealing with climate change projections of temperature-related mortality.

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“…Rainham et al, 2005;Dolney and Sheridan, 2006;Michelozzi et al, 2006), and climate change (e.g. Knight et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

A back‐trajectory and air mass climatology for the Northern Shenandoah Valley, USA

Hondula

Sitka

Davis

et al. 2009

Intl Journal of Climatology

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Synoptic-scale air quality climatologies can often be categorized into trajectory methods based on air parcel movement or air mass approaches that are primarily dictated by thermal and moisture conditions. Here, we examine the relationship between these two essentially independent methods of synoptic-scale climate classification: 72-h Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model back-trajectories and the Spatial Synoptic Classification (SSC) of air masses for Martinsburg, West Virginia, located at the northern end of the Shenandoah Valley, from 1997 to 2006. Statistically significant differences exist between trajectory groups across the six SSC air mass types within each season and between seasons within each air mass type.Further examination of the trajectory distributions reveals a high degree of overlap between trajectories associated with different air mass types. In some cases, up to 50% of one air mass's trajectories are statistically closer to the trajectories of a different air mass type. Accordingly, air mass alone cannot be used to identify specific source regions of pollutants. This suggests that, while an air mass classification system can be used to identify general flow patterns, the integration of both thermodynamic and air-flow variables in a synoptic classification should provide information that is not discernible from either method independently. The inclusion of both back-trajectory and air mass information represents the suite of environmental conditions that may enhance or suppress pollutant concentrations in the Shenandoah Valley better than using either measure independently.

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Increasing frequencies of warm and humid air masses over the conterminous United States from 1948 to 2005

Cited by 30 publications

References 20 publications

Centennial eolian cyclicity in the Great Plains, USA: a dominant climate pattern of wind transport over the past 4000 years?

Centennial eolian cyclicity in the Great Plains, USA: a dominant climate pattern of wind transport over the past 4000 years?

Declining impacts of hot spells on mortality in the Czech Republic, 1986–2009: adaptation to climate change?

A back‐trajectory and air mass climatology for the Northern Shenandoah Valley, USA

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