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Research Article Open access CC BY 4.0

Impact of Photosynthetically Active Radiation on Temperature, Relative Humidity, Wind Speed and Direction in Lubigi Cyperus papyrus L. Wetland Surface

Alfonse Opio, Frank Kansiime, Tom Otiti

Advances in Research · pp. 156–164 · Published 4 Oct 2014

10.9734/AIR/2015/11317

Abstract

Photosynthetically active radiation (PAR) is dominant solar radiation reaching the earth surface. PAR changes in response to the position of the sun and length of the day can be complex and perhaps even counter – intuitive to ecosystems. Assessment of PAR on relative humidity (RH), temperature, wind speed and direction in Cyperus papyrus (papyrus) wetland canopy surface was done during the months of September, 2010 (wet month) and June, 2011 (dry month) when the sun is at the equator and Tropics of Cancer respectively. PAR picked up in the morning (7.00 hour) and exhibited similar pattern during the months, although September values were significantly higher between 07.00 - 08.00 hours, 12.00 - 15.00 hours and at 19.00 hour. Significant difference in PAR at 19.00 hour was associated with significant temperature change between 20.00 to 21.00 hours. Significant temperature change between the months from 11.00 to 12.00 hours also occurred before that of PAR (12.00 - 15.00 hours). RH was significantly different between the months. Significant wind speed and direction between 07.00 - 08.00 hours was associated with significant PAR change between the months. Wind oscillation was easterly and southerly wind and significant difference in wind direction also occurred at 10.00 hour. Overall, data based on regression analysis indicate significantly strong correlation between PAR with RH, temperature and wind speed.  Such changes in weather variables in relation to the sun’s position, and ecosystem services and development requires assessment.  

Papyrus photosynthetically active radiation relative humidity temperature wetlands wind

References (13)

  1. 1 Observations: Surface and Atmospheric Climate Change
  2. 2 A Review of Climate Dynamics and Climate Variability in Eastern Africa [DOI]
  3. 3 Evidence for Large Decadal Variability in the Tropical Mean Radiative Energy Budget [DOI]
  4. 4 Evidence for Strengthening of the Tropical General Circulation in the 1990s [DOI]
  5. 5 Carbon and water cycles in tropical papyrus wetlands [DOI]
  6. 6 Impacts of the C4 sedge Cyperus papyrus L. on carbon and water fluxes in an African wetland [DOI]
  7. 7 The Role of Cloud Diurnal Variations in the Time-Mean Energy Budget [DOI]
  8. 8 A comparative study of surface energy fluxes of three communities (Phragmites australis, Scirpus acutus, and open water) in a prairie wetland ecosystem [DOI]
  9. 9 On the diurnal cycle of cloudiness over Lake Victoria and its influence on evaporation from the lake [DOI]
  10. 10 Comparison of hydrology and physical limnology of the East African Great Lakes
  11. 11 The Present Physicochemical Ecology of Lake Victoria, Uganda [DOI]
  12. 12 The diurnal course of plant water potential, stomatal conductance and transpiration in a papyrus (Cyperus papyrus L.) canopy [DOI]
  13. 13 Absorption of direct solar radiation by water vapour [DOI]

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