نتایج جستجو برای: insolation
تعداد نتایج: 1569 فیلتر نتایج به سال:
Cross-correlation between insolation intensities and a combination of sedimentary characters is introduced to obtain precise time calibration of sedimentary cycles. The first step is to transfer the section scale into ages using power spectra comparing the main periods with orbital cycles, while in the second step the standardized values of sedimentary signals are cross-correlated with the stan...
Swimming in ocean water, including ocean water at beaches not impacted by known point sources of pollution, is an increasing health concern. This study was an initial evaluation of the presence of indicator microbes and pathogens and the association among the indicator microbes, pathogens, and environmental conditions at a subtropical, recreational marine beach in south Florida impacted by non-...
BACKGROUND It has been proposed that vitamin D deficiency may be responsible for an increase in the prevalence of allergic diseases and asthma worldwide. Human ability to generate physiologically required quantities of vitamin D through sun exposure is decreasing with increasing geographical latitude. OBJECTIVES Considering that vitamin D deficiency is usually due to lack of outdoor sun expos...
The effect of ocean mixed layer depth on climate is explored in a suite of slab ocean aquaplanet simulations with different mixed layer depths ranging from a globally uniform value of 50–2.4 m. In addition to the expected increase in the amplitude of the seasonal cycle in temperature with decreasing ocean mixed layer depth, the simulated climates differ in several less intuitive ways including ...
INTRODUCTION Light before and during acute illness has been associated with both benefit and harm in animal models and small human studies. Our objective was to determine the associations of light duration (photoperiod) and intensity (insolation) before and during critical illness with hospital mortality in ICU patients. Based on the 'winter immunoenhancement' theory, we tested the hypothesis t...
Equatorial insolation: from precession harmonics to eccentricity frequencies A. Berger, M. F. Loutre, and J. L. Mélice Université catholique de Louvain, Institut d’Astronomie et de Géophysique G. Lemaı̂tre, 2 Chemin du Cyclotron, 1348 Louvain-la-Neuve, Belgium Department of Oceanography, University of Cape Town, Rondebosch 7701, South Africa Received: 22 June 2006 – Accepted: 9 July 2006 – Publi...
The “clear-sky insolation discrepancy” surfaced a few years ago: several well-regarded theoretical simulations (sound radiative transfer codes and carefully measured inputs for them) produced values for clear-sky shortwave (SW) insolation that exceeded measurements from 20 to 30 Wm. Now, by both carefully screening (Long-Ackerman) the radiometer observations and including the record of the newl...
To reconstruct variability of the West African monsoon and associated vegetation changes on precessional and millennial time scales, we analyzed a marine sediment core from the continental slope off Senegal spanning the past 44,000 years (44 ka). We used the stable hydrogen isotopic composition (dD) of individual terrestrial plant wax n-alkanes as a proxy for past rainfall variability. The abun...
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