Search results for "Low latitude"
showing 3 items of 3 documents
Ten years of measured UV Index from the Spanish UVB Radiometric Network.
2013
An analysis is made of the UV Index (UVI) obtained from the ultraviolet erythemal solar radiation (UVER) data measured by the Spanish UVB Radiometric Network between the years 2000 and 2009. Previously, the daily UVI has been evaluated using two different criteria: (a) the value corresponding to solar noon; and (b) the daily maximum value. The mean percentage of agreement is 92% if we consider the cases for which the difference is zero or one UVI unit. These results are similar to those obtained in a previous work where only 2 years were analyzed. In all the stations the UVI reaches very high values (8-10) in spring-summer, and the very high and extreme (≥ 11) UVI values are more dependent …
Climatic and Pathological Rhythms in a Humid Tropical Area, the Case of The Philippines
1997
The fact that weather significantly affects yearly, monthly and daily morbidity in human populations has been documented for a long time by a number of individuals. They have illustrated very well some of the basic structure and underlying mechanisms of seasonality in morbidity. But until now almost all these efforts were carried out in countries with temperate mid-latitude climates. Furthermore, meteoropathological investigations have for the most part concentrated upon mortality statistics for the usual reasons of data availability and comparability. However, an important question that arises when considering the effects of weather on diseases is how the relationship varies under differen…
Sunlight exposure exerts immunomodulatory effects to reduce multiple sclerosis severity
2021
AbstractBackgroundMultiple sclerosis (MS) disease risk is associated with reduced sun exposure. This study assessed the relationship between measures of sun-exposure (vitamin D (vitD), latitude) and MS disease severity, the mechanisms of action, and effect-modification by medication and sun-sensitivity associated MC1R variants.MethodsTwo multi-center cohort studies (nNationMS=946, nBIONAT=991). Outcomes were the multiple sclerosis severity score (MSSS) and the number of Gd-enhancing lesion (GELs). RNAseq of four immune cell populations before and after UV-phototherapy of five MS patients.ResultsHigh serum vitD was associated with reduced MSSS (PNationMS=0.021; PBIONAT=0.007) and reduced ris…