نتایج جستجو برای: climatic parameters

تعداد نتایج: 607571  

In this study, using Modis images and wets pass model, the value of evapotranspiration for the northern Karun basin was estimated monthly from 2000 to 2014. The value of correlation coefficient for the obtained evaporations was R2 = 0.72. This model was calibrated and verified for different regions with different parameters. Data from 2000 to 2009 were used for calibration and data from 2010 to...

2013
Jaime A. Ramos Patrícia Pedro Antonio Matos Vitor H. Paiva

We used 10 years of data on clutch size, egg size and diet, and 8 years of data on timing of laying on Little Terns (Sternula albifrons) breeding in Ria Formosa lagoon system, Algarve, Portugal to assess whether diet acts as an important intermediary between climatic conditions and breeding parameters. We used Generalized Linear Models to relate (1) the relative occurrence and size of the main ...

2004

TOPIC 1 : CLIMATE AND ENVIRONMENT ................................ 1 TRENDS AND VARIATION IN MONTHLY RAINFALL AND TEMPERATURE IN SURINAME ....................................................................2 EVALUATION OF THE EFFECTS OF ENSO TELECONNECTION ON CLIMATIC PARAMETERS FLUCTUATIONS IN KHORASAN PROVINCE I.R. OF IRAN..........................................................................

2010
R. K. Rai Alka Upadhyay S. P. Ojha

Identification of the precise nature and attributes of the time series of climatological data is very important and is usually the first step for water resources planning and management. Such exercise is very important for hydro-climatic extremes. In many instances, a climatic time series is generally not statistically independent but is comprised of patterns of persistence, cycles, trends or s...

Journal: :The American naturalist 2011
Susana Clusella-Trullas Tim M Blackburn Steven L Chown

Determining organismal responses to climate change is one of biology's greatest challenges. Recent forecasts for future climates emphasize altered temperature variation and precipitation, but most studies of animals have largely focused on forecasting the outcome of changes in mean temperature. Theory suggests that extreme thermal variation and precipitation will influence species performance a...

2007
S. S. P. SHEN H. YIN T. M. SMITH

The sampling error variances of the 5° 5° Global Historical Climatological Network (GHCN) monthly surface air temperature data are estimated from January 1851 to December 2001. For each GHCN grid box and for each month in the above time interval, an error variance is computed. The authors’ error estimation is determined by two parameters: the spatial variance and a correlation factor determined...

2016
H. Al-Hinai

This paper reports the use of a mathematical model to predict the productivity of a simple solar still under different climatic, design and operational parameters in Oman. The shallow water basin, 23 cover tilt angle, 0.1 m insulation thickness and asphalt coating of the solar still were found to be the optimum design parameters that produced an average annual solar still yield of 4.15 kg/m day...

Journal: :Environmental Modelling and Software 2008
Norbert Solymosi Anikó Kern Ákos Maróti-Agóts Levente Horváth Károly Erdélyi

The recent and rapid change in climate seems to have strong impact on many aspects of agriculture, health, ecology, economy and the society. To model these impacts researchers need access to future and past climate databases, some of which are publicly available. One possible source of climate data sets is the collection of the Tyndall Centre for Climate Change Research. We developed an easy to...

Journal: :Ecology 2010
Daniel Oro Roxana Torres Cristina Rodríguez Hugh Drummond

In marine ecosystems climatic fluctuation and other physical variables greatly influence population dynamics, but differential effects of physical variables on the demographic parameters of the two sexes and different age classes are largely unexplored. We analyzed the effects of climate on the survival and recruitment of both sexes and several age classes of a long-lived tropical seabird, the ...

2015
Charles Lugomela Thomas J. Lyimo Lucy A. Namkinga Sabrina Moyo Ralf Goericke Sara Sjöling

The bacterium causing cholera, Vibrio cholerae, is essentially a marine organism and its ecological dynamics have been linked to oceanographic conditions and climate. We used autoregressive models with external inputs to identify potential relationships between the number of cholera cases in the coastal regions of mainland Tanzania with climatic and environmental indices (maximum air temperatur...

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