GREENHOUSE COOLING WITH CONTINUOUS GENERATION OF UPWARD-MOVING FOG FOR REDUCING WETTING OF PLANT FOLIAGE AND AIR TEMPERATURE FLUCTUATIONS: A CASE STUDY

2008 ◽  
pp. 321-326 ◽  
Author(s):  
K. Ohyama ◽  
T. Kozai ◽  
H. Toida
Keyword(s):  
Air Temperature ◽  
Temperature Fluctuations ◽  
Continuous Generation ◽  
Plant Foliage ◽  
Upward Moving

scholarly journals Spatiotemporal Response of Vegetation to Rainfall and Temperature fluctuations in the Sahel. Case study in the Forest Reserve of Fina, Mali

2021 ◽  
Author(s):  
Karamoko Sanogo ◽  
Birhanu B. Zemadim ◽  
Souleymane Sanogo ◽  
Ashatu Abdulkadiri ◽  
Abdramane BA
Keyword(s):  
Air Temperature ◽  
Arid Zone ◽  
Time Lag ◽  
Temperature Fluctuations ◽  
Vegetation Response ◽  
Forest Reserve ◽  
Forest Reserves ◽  
Climate Fluctuation ◽  
Spatiotemporal Response

Forests constitute a key component of the Earth system but the sustainability of the forest reserves in the semi-arid zone is a real concern since its vegetation is very sensitive to the climate fluctuation. The understanding of the mechanisms for the interaction vegetation-climate is poorly studied in the context of African Sahel. In this study, the characteristics of the vegetation response to the fluctuations of precipitation and temperature is determined for the forest reserve of Fina. Rainfall estimates, air temperature and NDVI are used to establish the lag correlations between fluctuations of vegetation and climate variables at both seasonal and interannual bases. Results shows increasing tendency of NDVI started from the 1990s coinciding the recovery of the rainfall from the 1980s drought and the obtained correlation(r=0.66) is statistically significant (pvalue<0.01). The strongest responses of vegetation to rainfall and temperature fluctuations were found after 30 and 15 days, respectively. Moreover, at shorter time lag (e.g. 15 days) more pronounced vegetation responses to both rainfall and temperature were found in agricultural dominated land while at longer time lag (e.g. 30 days) stronger response was observed in Bare dominated land. The vegetation response to the climate fluctuation is modulated by the land use/cover dynamics. Keywords: NDVI, Rainfall, Air temperature, vegetation response, Fina Forest Reserve, Mali.

scholarly journals The Importance of Water Temperature Fluctuations in Relation to the Hydrological Factor. Case Study – Bistrita River Basin (Romania)

2014 ◽  
Vol 8 (2) ◽  
pp. 183-194 ◽  
Author(s):  
Gianina Maria Cojoc ◽  
Gheorghe Romanescu ◽  
Alina Tirnovan
Keyword(s):  
Water Temperature ◽  
River Basin ◽  
Air Temperature ◽  
Hydrological Regime ◽  
Temperature Fluctuations ◽  
Negative Effects ◽  
The Past ◽  
Ice Jam ◽  
Real Phenomenon

Abstract The increase in most components of the climate over the past 50 years, including air and water temperature, is a real phenomenon, as attested by the numerous specialized researches according to IPCC (2013). The water temperature is one of the most important climatic components in analyzing the hydrological regime of the Bistrita River (Romania). The thermal regime of the Bistrita River basin and the frost phenomena associated with the risk factor are particularly important and frequently appear in this area. In recent years, under the Siret Water Basin Administration, this parameter was permanently monitored, so we could do an analysis, which shows that the water temperature fluctuations, influenced by air temperature, lead to the emergence of the ice jam phenomenon. The present study aims to analyze the water temperature, as compared to the air temperature, and the effect of these components on the liquid flow regime (the values were recorded at the hydrological stations on the main course of the Bistrita River). The negative effects resulted from the ice jam phenomenon require developing methods of damage prevention and defense. The frost phenomena recorded after the construction of the Bicaz dam are analyzed in this article

scholarly journals On the predictability of lake surface temperature using air temperature in a changing climate: A case study for Lake Tahoe (U.S.A.)

2017 ◽  
Vol 63 (1) ◽  
pp. 243-261 ◽  
Author(s):  
S. Piccolroaz ◽  
N. C. Healey ◽  
J. D. Lenters ◽  
S. G. Schladow ◽  
S. J. Hook ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Air Temperature ◽  
Lake Tahoe ◽  
Lake Surface ◽  
Changing Climate

The Effect of Bagnold Dunes Slopes on the Short Timescale Air Temperature Fluctuations at Gale Crater on Mars

2018 ◽  
Vol 45 (21) ◽  
pp. 11,588-11,594 ◽  
Author(s):  
Nina Miller ◽  
Manuel de la Torre Juárez ◽  
Leslie Tamppari
Keyword(s):  
Air Temperature ◽  
Temperature Fluctuations ◽  
Gale Crater ◽  
Short Timescale

scholarly journals Thermal history and comfort in a Brazilian subtropical climate: a 'cool' addiction hypothesis

2016 ◽  
Vol 16 (1) ◽  
pp. 7-20 ◽  
Author(s):  
Renata De Vecchi ◽  
Christhina Maria Cândido ◽  
Roberto Lamberts
Keyword(s):  
Air Temperature ◽  
Indoor Air ◽  
Thermal History ◽  
Air Conditioning ◽  
Prolonged Exposure ◽  
Temperature Fluctuations ◽  
Subtropical Climate ◽  
Indoor Thermal Comfort ◽  
Air Speed ◽  
The Impact

Abstract Currently, there is a rising trend for commercial buildings to use air conditioning to provide indoor thermal comfort. This paper focuses on the impact of prolonged exposure to indoor air-conditioned environments on occupants' thermal acceptability and preferences in a mixed-mode building in Brazil. Questionnaires were administered while indoor microclimatic measurements were carried out (i.e., air temperature, radiant air temperature, air speed and humidity). Results suggest significant differences in occupants' thermal acceptability and cooling preferences based on thermal history; differences were found between groups based on different physical characteristics (i.e., different gender and body condition). The findings also indicated a significant potential to implement temperature fluctuations indoors when occupants are exposed to air conditioning environments in warm and humid climates.

The impact of SST on the wind and air temperature simulations: a case study for the coastal region of the Rio de Janeiro state

2018 ◽  
Vol 131 (4) ◽  
pp. 1083-1097 ◽  
Author(s):  
Ian Cunha D`Amato Viana Dragaud ◽  
Mauricio Soares da Silva ◽  
Luiz Paulo de Freitas Assad ◽  
Márcio Cataldi ◽  
Luiz Landau ◽  
...  
Keyword(s):  
Air Temperature ◽  
Rio De Janeiro ◽  
Coastal Region ◽  
The Impact ◽  
Janeiro State

scholarly journals Mitigation Strategies for Overheating and High Carbon Dioxide Concentration within Institutional Buildings: A Case Study in Toronto, Canada

Buildings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 124 ◽  
Author(s):  
Claire Tam ◽  
Yuqing Zhao ◽  
Zaiyi Liao ◽  
Lian Zhao
Keyword(s):  
Carbon Dioxide ◽  
Air Quality ◽  
Indoor Air Quality ◽  
Air Temperature ◽  
Indoor Air ◽  
Indoor Environment ◽  
Thermal Conditions ◽  
Co2 Concentration ◽  
Hvac System

Indoor air quality and thermal conditions are important considerations when designing indoor spaces to ensure occupant health, satisfaction, and productivity. Carbon dioxide (CO2) concentration and indoor air temperature are two measurable parameters to assess air quality and thermal conditions within a space. Occupants are progressively affected by the indoor environment as the time spent indoors prolongs. Specifically, there is an interest in carrying out investigations on the indoor environment through surveying existing Heating, Ventilation, Air Conditioning (HVAC) system operations in classrooms. Indoor air temperature and CO2 concentration in multiple lecture halls in Toronto, Canada were monitored; observations consistently show high indoor air temperature (overheating) and high CO2 concentration. One classroom is chosen as a representative case study for this paper. The results verify a strong correlation between the number of occupants and the increase in air temperature and CO2 concentration. Building Energy Simulation (BES) is used to investigate the causes of discomfort in the classroom, and to identify methods for regulating the temperature and CO2 concentration. This paper proposes retro-commissioning strategies that could be implemented in institutional buildings; specifically, the increase of outdoor airflow rate and the addition of occupancy-based pre-active HVAC system control. The proposed retrofit cases reduce the measured overheating in the classrooms by 2-3 °C (indoor temperature should be below 23 °C) and maintain CO2 concentration under 900 ppm (the CO2 threshold is 1000 ppm), showing promising improvements to a classroom’s thermal condition and indoor air quality.

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