Search Results

You are looking at 1 - 10 of 12 items for :

  • Seasonal effects x
  • Biogeophysical Climate Impacts of Land Use and Land Cover Change (LULCC) x
  • All content x
Clear All
Soumaya Belmecheri, Flurin Babst, Amy R. Hudson, Julio Betancourt, and Valerie Trouet

methodology used here is an alternative for the previous depictions and characterization of the NHJ mean latitudinal position and variability and complements the jet stream indices that Woollings et al. (2014) developed for the North Atlantic sector. A bottom-up approach is applied, informed by the seasonal and spatial coherence in NHJ latitudinal position that allows us to define seasonally and longitudinally explicit indices of NHJ latitudinal variability. In pursuing the diagnosis of NHJ climatology

Full access
G. Strandberg and E. Kjellström

. Previous studies likewise point to minor effects on seasonal mean precipitation (e.g., Roy et al. 2007 ; Quintanar and Mahmood 2012 ; Seneviratne et al. 2013 ; Winchester et al. 2017 ); however, comparison with observations suggests that climate models are not able to fully reproduce the soil-moisture precipitation feedback ( Taylor et al. 2012 ), although it cannot be ruled out that this is because of the coarse resolution in the investigated global climate models. The current study suggests that

Full access
Zhao Yang, Francina Dominguez, Hoshin Gupta, Xubin Zeng, and Laura Norman

property of summertime daily rainfall amount in and around the Tokyo Metropolitan Area . Tenki , 50 , 31 – 41 . Tayanç , M. , M. Karaca , and O. Yenigün , 1997 : Annual and seasonal air temperature trend patterns of climate change and urbanization effects in relation to air pollutants in Turkey . J. Geophys. Res. , 102 , 1909 – 1919 , doi: 10.1029/96JD02108 . Tewari , M. , F. Chen , and H. Kusaka , 2006 : Implementation and evaluation of a single-layer urban canopy model in WRF

Full access
Edward Armstrong, Paul Valdes, Jo House, and Joy Singarayer

1. Introduction Human-induced land-use change (LUC), such as the conversion of natural land cover to agriculture, transforms the land surface, altering its structure and influencing biogeophysical processes such as albedo, leaf area index (LAI), seasonality, surface roughness, and moisture fluxes. This has implications for the surface energy balance, altering shortwave radiation (SW) and the partitioning of latent and sensible heat (e.g., Brovkin et al. 2009 ; Bala et al. 2007 ; Boisier et

Open access
W. L. Ellenburg, R. T. McNider, J. F. Cruise, and John R. Christy

warming trend prevailed (decreased latent heat). Trail et al. (2013) suggests that reforestation of cropland in the southeastern United States results in a 0.5-K warming of the surface air due primarily to the albedo effects. The authors arrived at their results by downscaling the Goddard Institute for Space Studies global climate model to the Southeast and performing a sensitivity analysis with respect to albedo and resistance coefficients of different land-use covers. The results were hypothetical

Full access
Weiyue Zhang, Zhongfeng Xu, and Weidong Guo

and the extratropics via the excitation of atmospheric waves ( Schneck and Mosbrugger 2011 ). Schneck and Mosbrugger (2011) also noted that remote effects are sensitive to small initial changes, which suggests that the remote responses to land-cover change contain high uncertainties. Findell et al. (2006) argued that the extratropical response to complete tropical deforestation is difficult to distinguish from natural climate variability. In this study, we further investigate the influence of

Full access
Andres Schmidt, Beverly E. Law, Mathias Göckede, Chad Hanson, Zhenlin Yang, and Stephen Conley

geographical locations corresponding to the ecoregion classification. Other EFZ clusters, however, are composed of areas that are not necessarily spatially close but similar in terms of their physical properties and traits accounted for during the clustering process. To account for seasonal effects on the fluxes and mixing ratios, while also retaining a sufficient number of 3-hourly measurements to be incorporated in the inversion process, we calculated transient scaling factors for monthly intervals

Full access
Keith J. Harding, Tracy E. Twine, and Yaqiong Lu

regional climate. The impacts of dynamic crops have been previously investigated using offline models to examine irrigation water demands ( aus der Beek et al. 2010 ) and in a coupled regional climate model to analyze irrigation’s effects on temperature ( Lu et al. 2015 ), but the effect of dynamic crops on irrigation’s influence on precipitation has not been studied. Previous efforts to estimate the impact of irrigation on the hydroclimate of the central United States have included a wide array of

Full access
Pedro Sequera, Jorge E. González, Kyle McDonald, Steve LaDochy, and Daniel Comarazamy

diverse local and synoptic factors, especially at midlatitude coastal cities where the effects of the UHI on regional influences merge with large-scale atmospheric and oceanic circulation patterns. Several studies have documented and modeled the effects of the UHI in regional temperatures and mesoscale flow patterns ( Yoshikado 1992 , 1994 ; Kitada et al. 1998 ; Kusaka et al. 2000 ; Ohashi and Kida 2002 ; Lo et al. 2007 ; Shepherd et al. 2010 ; Dandou et al. 2009 ; Carter et al. 2012

Full access
Yaqian He and Eungul Lee

vegetation with lower albedo compared with sand absorbed more solar radiation, which might create more rainfall over Africa. Los et al. (2006) concluded that vegetation effects accounted for about 30% of annual rainfall variation in the Sahel. It appears that both regional land surface and remote ocean forcings may be responsible for the variability of the Sahel rainfall. While the previous studies are concerned with the land and ocean factors separately, the relative contribution of the two different

Full access