Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1995-1999  (1)
  • 1975-1979  (1)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied climatology 58 (1997), S. 175-188 
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Land-surface heterogeneity affects surface energy fluxes. The magnitudes of selected land-surface influences are quantified by comparing observations with model simulations of the FIFE (First ISLSCP Field Experiment) domain. Several plausible heterogeneous and homogeneous initial and boundary conditions are examined, although soilmoisture variability is emphasized. It turns out that simple spatial averages of surface variation produced biased flux values. Simulated maximum latent-heat fluxes were approximately 30 to 40 W m−2 higher, and air temperatures ≃ 0.4 °C lower (at noon), when computations were initialized with spatially averaged soil-moisture and leaf-area-index fields. The planetary boundary layer (PBL) height and turbulent exchanges were lower as well. It additionally was observed that (largely due to the nonlinear relationship between initial soil-moisture availability and the evapotranspiration rate), “real” latent-heat flux can be substantially less than simulated latent-heat flux using models initialized with spatially averaged soil-moisture fields. Differences between “real” and simulated fluxes also vary with the resolution at which “real” soil-moisture heterogeneity is discretized.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied climatology 26 (1978), S. 277-295 
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Drei Niederschlagsregionen in Kalifornien werden identifiziert und näher beschrieben. Vier voneinander unabhängige Quellen der Niederschlagsvariabilität wurden durch eine Hauptkomponentenanalyse der Kovarianzmatrize aufgedeckt und zusammen mit den als fünfte Dimension fungierenden Stationsmittelwerten an Hand von Ward's [14] Algorithmus ausgewertet, um die regionalen Verhältnisse abzuleiten. Eine Diskussion der gegenwärtigen Anwendungsmöglichkeiten dieser Methode ist beigefügt. Diese Methode scheint erfolgreicher zu sein, als die von Willmott [16] und anderen früher beschriebenen. Die Eingangsdaten bestanden aus 120 monatlichen Niederschlagssummen aus den Jahren 1961–1970 von 90 willkürlich gewählten kalifornischen Stationen.
    Notes: Summary Three precipitation regions in California are identified, mapped and otherwise described. Four independent sources of precipitation variation were discovered by a P-mode principal components analysis of a covariance matrix and they, plus a fifth dimension of station means, were evaluated by Ward's [14] algorithm in order to arrive at the regionalization. A discussion of the present application of this methodology is also included as it is thought to be a more appropriate procedure than those described by Willmott [16] and others. Data for the study were 120 monthly precipitation totals observed from 1961–1970 at each of 90 randomly chosen stations within California.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...