Search Results

You are looking at 81 - 90 of 22,001 items for :

  • Seasonal effects x
  • All content x
Clear All
Melanie Brown and Dominique Bachelet

in climate impacts ( Table 11 ). We define climate impacts here as the effects of climate on both natural resources and society. Land managers were specifically interested in vegetation shifts, including the spread of juniper and invasive annual grasses, plant migration, and wildlife habitat changes. One manager emphasized, “A main concern or question I have is about the final impacts. What are they going to be? What will be the seasonality and the amounts of moisture? What’s going to happen and

Full access
Hirohiko Masunaga

possibility that neighboring ridges of the interrupted Kelvin wave as a whole could account for the slow eastward propagation of the MJO. The analysis of Masunaga et al. (2006) , however, is limited to subjective diagnosis based on 10 MJO episodes. In this work, long-term outgoing longwave radiation (OLR) data are analyzed to seek climatological evidence (or its absence) of the Kelvin and ER waves as a driver of MJO propagation. Seasonality and regionality of the MJO, which were outside the scope of

Full access
Sean Faulk, Jonathan Mitchell, and Simona Bordoni

cross-equatorial circulation and upper-level easterlies in the tropics and can lead to seasonal shifts in the Hadley cell’s dominant angular momentum budget ( Bordoni and Schneider 2008 ; Schneider and Bordoni 2008 ). Additionally, moisture greatly impacts the zonally averaged large-scale circulation owing to the effects of latent heat on static stability and meridional temperature gradients ( Frierson et al. 2006 ; Frierson 2008 ). We aim here to determine how sensitive the large

Full access
H. Fuenzalida and B. Rosenblüth

72g $OURNAL OF CLIMATE AND APPLIED METEOROLOGY VOLUME25Distortion Effects of the Anomaly Method of Removing Seasonal or Diurnal Variations from Climatological Time Series H. FUENZALIDA AND B. ROSENBL1DTHD~partamento de Geofisica, Universidad de Chile, Santiago(Manuscript received 18 February 1985, in final form 26 August 1985)ABSTRACT In the environmental sciences

Full access
James V. Rudolph and Katja Friedrich

relate seasonal and annual reflectivity patterns to atmospheric stability and cloud microphysics observed during individual cases. Furthermore, we examine the effects of surface temperature on the vertical structure of reflectivity and implications for the impact of climate change on the hydrologic cycle. To our knowledge, multiple-year observations of vertical precipitation structure in the European Alps have not been investigated. Most precipitation climatologies are based on surface observations

Full access
Verónica Torralba, Francisco J. Doblas-Reyes, Dave MacLeod, Isadora Christel, and Melanie Davis

been made in practice. In recent years the skill of climate predictions has significantly improved ( Doblas-Reyes et al. 2013 ), however. For instance, seasonal forecast systems (i.e., those that provide information for periods ranging from a month to slightly longer than a year into the future) are now providing skillful forecasts for extratropical regions where no substantial skill was found before ( Clark et al. 2017 ; Dunstone et al. 2016 ; Scaife et al. 2014 ). This will promote their

Full access
Eduardo Barbaro, Amauri P. Oliveira, Jacyra Soares, Georgia Codato, Maurício J. Ferreira, Primož Mlakar, Marija Z. Božnar, and João F. Escobedo

) , mean cloud effects were successfully identified by comparing the LW observed under clear-sky conditions with the LW considering all-sky conditions. Clear-sky averages are statistically significant only between April and September when the number of clear-sky days are larger than 5%. The largest number of clear-sky days occurs in August (138 days in 9 yr), the driest month of the year in São Paulo. The seasonal variation of LW in São Paulo indicates that the maximum monthly averaged values of LW are

Full access
Jorge Vázquez-Cuervo, Edward M. Armstrong, Kenneth S. Casey, Robert Evans, and Katherine Kilpatrick

41 leads to quantitative improvements in the determination of SSTs in coastal areas and whether those improvements are associated with changes in SST gradients. The paper is divided into six sections, including the introduction. Section 2 of the paper gives an overview of the Pathfinder algorithm. Section 3 will focus on the seasonal differences between V50 and V41, specifically along the western and eastern coasts of the United States. Section 4 presents the results from a comparison of V

Full access
Giovanni Forzieri, Fabio Castelli, and Enrique R. Vivoni

1. Introduction The North American monsoon (NAM) region in the southwestern United States and northwestern Mexico experiences seasonal greening of a range of ecosystems due to the synchronized availability of precipitation and solar radiation in the summer, July–September (JAS). Vegetation dynamics in parts of the NAM region have been explored using remote sensing observations and related to precipitation and soil moisture ( Mora and Iverson 1998 ; Watts et al. 2007 ; Pennington and Collins

Full access
Scott R. Templeton, Alan A. Hooper, Heather D. Aldridge, and Norman Breuer

as potential users of seasonal climate forecasts and their roles as educators and advisors of farmers. The study of Prokopy et al. (2013) was similarly focused on agricultural advisors as potential users of historical weather and climate information. Moreover, the sample proportions in the studies from Florida ( Cabrera et al. 2006 ), North Carolina ( Breuer et al. 2011 ), and the upper Midwest ( Prokopy et al. 2013 ) were not used to statistically test whether majorities of extensionists in

Full access