scholarly journals The evaporation loss from water reservoirs of Uzbekistan

2019 ◽  
Vol 97 ◽  
pp. 05027
Author(s):  
Furkat Gapparov ◽  
Sobir Kodirov ◽  
Safar Mansurov
Keyword(s):  
Wind Speed ◽  
Air Temperature ◽  
Open Water ◽  
Average Depth ◽  
Weather Station ◽  
Evaporation Losses ◽  
Water Surfaces ◽  
Annual Evaporation ◽  
The Relationship ◽  
Over Time

The article deals with the results of the calculation of annual evaporation losses from the open water surfaces of reservoirs of Uzbekistan. For the estimations, we used the formula of the dependence of the temperature of open water surfaces of the reservoirs with the air temperature and average depth of them, and the tendency of air temperature change over time. The relationship between the wind speed above reservoirs and the weather station was defined.

scholarly journals The influence of precipitation origin on the δ18O–T relationship at Neumayer station, Ekstrmisen, Antarctica

2004 ◽  
Vol 39 ◽  
pp. 41-48 ◽  
Author(s):  
Elisabeth Schlosser ◽  
Carleen Reijmer ◽  
Hans Oerter ◽  
Wolfgang Graf
Keyword(s):  
Air Temperature ◽  
Open Water ◽  
Weddell Sea ◽  
Air Masses ◽  
Ice Coverage ◽  
Synoptic Weather ◽  
Time Period ◽  
The Relationship ◽  
Snow Samples

AbstractThe relationship between δ18O and air temperature at Neumayer station, Ekstrmisen, Antarctica, was investigated using fresh-snow samples from the time period 1981–2000. A trajectory model that calculated 5 day-backward trajectories was used to study the influence of different synoptic weather situations and thus of different moisture sources on this correlation. Generally a high correlation between air temperature and δ18O was found, but the quality of the δ18O–T relationship varied with the different trajectory classes. Additionally, the sea-ice coverage on the travel path of the moist air was considered. The amount of open ocean water underneath the trajectory has a large influence on the δ18O–T relationship. For trajectories that lead completely above open water, no significant correlation between δ18O and T was found, because mixing with air masses containing additionally evaporated water vapour from the ocean influences the isotope ratio of precipitation. A very high correlation, however, was found for transports over the completely ice-covered Weddell Sea.

scholarly journals The influence of humidity on the ablation of continental-type glaciers

1992 ◽  
Vol 16 ◽  
pp. 107-114 ◽  
Author(s):  
Hiroyuki Ohno ◽  
Tetsuo Ohata ◽  
Keiji Higuchi
Keyword(s):  
Air Temperature ◽  
Tien Shan ◽  
Annual Precipitation ◽  
Field Observations ◽  
Weather Station ◽  
Warm Environment ◽  
Humidity Change ◽  
Temperature And Humidity ◽  
Annual Evaporation

The annual evaporation of a continental-type glacier (43°05’ Ν, 86°48’ E) in the Chinese Tien Shan is estimated, based on data derived from four field observations carried out between summer 1987 and spring 1988, and data from a permanent weather station near the glacier. The evaporation during the melting and non-melting seasons is estimated as 81 mm and negligible, respectively. Assuming that the ablation is equivalent to the annual precipitation (650 mm) in 1987, estimated annual evaporation of 81 mm is 12% of the ablation and consumes 54% of the energy which causes the ablation. It can be said that evaporation suppresses ablation by 50% in comparison with the condition in which there is no evaporation.The influence of fluctuations of air temperature and humidity on the ablation of the glacier were evaluated. Changes in temperature and humidity cause larger changes in ablation of glaciers in a cold and dry climate. The influence of humidity change is very important to glaciers located in a relatively warm environment.

scholarly journals The influence of humidity on the ablation of continental-type glaciers

1992 ◽  
Vol 16 ◽  
pp. 107-114 ◽  
Author(s):  
Hiroyuki Ohno ◽  
Tetsuo Ohata ◽  
Keiji Higuchi
Keyword(s):  
Air Temperature ◽  
Tien Shan ◽  
Annual Precipitation ◽  
Field Observations ◽  
Weather Station ◽  
Warm Environment ◽  
Humidity Change ◽  
Temperature And Humidity ◽  
Annual Evaporation

The annual evaporation of a continental-type glacier (43°05’ Ν, 86°48’ E) in the Chinese Tien Shan is estimated, based on data derived from four field observations carried out between summer 1987 and spring 1988, and data from a permanent weather station near the glacier. The evaporation during the melting and non-melting seasons is estimated as 81 mm and negligible, respectively. Assuming that the ablation is equivalent to the annual precipitation (650 mm) in 1987, estimated annual evaporation of 81 mm is 12% of the ablation and consumes 54% of the energy which causes the ablation. It can be said that evaporation suppresses ablation by 50% in comparison with the condition in which there is no evaporation.The influence of fluctuations of air temperature and humidity on the ablation of the glacier were evaluated. Changes in temperature and humidity cause larger changes in ablation of glaciers in a cold and dry climate. The influence of humidity change is very important to glaciers located in a relatively warm environment.

scholarly journals Sensitivity analysis of Penman evaporation method

2014 ◽  
Vol 16 (4) ◽  
pp. 628-639 ◽  
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Sunshine Duration ◽  
Surface Air Temperature ◽  
Meteorological Variables ◽  
Data Sets ◽  
Evaporation Method ◽  
Annual Evaporation ◽  
The Impact ◽  
The Relationship

<p>In this paper the influence of key meteorological variables in Penman evaporation method was explored. Monthly data over a 16-years period (1993-2008)were used from Thissio-Athens meteorological station. The climatic parameters of surface air temperature, relative humidity, wind speed and sunshine duration were varied in Penman method and the obtained results were compared. Moreover, the investigation of sunshine duration during winter months was thoroughly examined. An open source software (Hydrognomon) was used for this exploration. The analysis showed that: (a) the influence of the meteorological parameters to evaporation is almost linear, (b) the temperature has the greater influence to annual evaporation while the relative humidity, wind speed and sunshine duration follow, and (c) the relationship between sunshine duration and evaporation in a monthly scale&nbsp; is not constant. During the winter months the increase of sunshine duration leads to decrease of evaporation.</p> <div> <p>The performed analysis could be used to quantify the impact of climatic change on evaporation, to determine the accuracy of predicted evaporation against that obtained from the meteorological instruments, and to investigate the alternative values of several meteorological variables in the case of limited data sets.&nbsp;</p> </div> <p>&nbsp;</p>

scholarly journals Meteorological effects of the solar eclipse of 20 March 2015: analysis of UK Met Office automatic weather station data and comparison with automatic weather station data from the Faroes and Iceland

2016 ◽  
Vol 374 (2077) ◽  
pp. 20150212 ◽  
Author(s):  
Edward Hanna ◽  
John Penman ◽  
Trausti Jónsson ◽  
Grant R. Bigg ◽  
Halldór Björnsson ◽  
...  
Keyword(s):  
Wind Speed ◽  
Air Temperature ◽  
Solar Eclipse ◽  
Temperature Drop ◽  
Weather Station ◽  
Automatic Weather Station ◽  
Station Data ◽  
Weather Station Data ◽  
The Mean ◽  
Weather Stations

Here, we analyse high-frequency (1 min) surface air temperature, mean sea-level pressure (MSLP), wind speed and direction and cloud-cover data acquired during the solar eclipse of 20 March 2015 from 76 UK Met Office weather stations, and compare the results with those from 30 weather stations in the Faroe Islands and 148 stations in Iceland. There was a statistically significant mean UK temperature drop of 0.83±0.63°C, which occurred over 39 min on average, and the minimum temperature lagged the peak of the eclipse by about 10 min. For a subset of 14 (16) relatively clear (cloudy) stations, the mean temperature drop was 0.91±0.78 (0.31±0.40)°C but the mean temperature drops for relatively calm and windy stations were almost identical. Mean wind speed dropped significantly by 9% on average during the first half of the eclipse. There was no discernible effect of the eclipse on the wind-direction or MSLP time series, and therefore we can discount any localized eclipse cyclone effect over Britain during this event. Similar changes in air temperature and wind speed are observed for Iceland, where conditions were generally clearer, but here too there was no evidence of an eclipse cyclone; in the Faroes, there was a much more muted meteorological signature. This article is part of the themed issue ‘Atmospheric effects of solar eclipses stimulated by the 2015 UK eclipse’.

scholarly journals ANALISIS HUBUNGAN VARIABEL CUACA DENGAN KEJADIAN DBD DI KOTA YOGYAKARTA

2019 ◽  
Vol 10 (1) ◽  
pp. 1-7
Author(s):  
Rinaldi Daswito ◽  
Lutfan Lazuardi ◽  
Hera Nirwati
Keyword(s):  
Wind Speed ◽  
Air Temperature ◽  
Hemorrhagic Fever ◽  
Weather Data ◽  
Weather Variables ◽  
Administrative Area ◽  
Relationship Of ◽  
The Relationship ◽  
The City ◽  
Yogyakarta City

Dengue Hemorrhagic Fever (DHF) is the main public health issues in Indonesia, even endemic in all provinces. The incidence of DHF is still fluctuated annually in the city of Yogyakarta. This study aims to determine the pattern of the relationship between weather variables (air temperature, rainfall, humidity, and wind speed) on the incidence of DHF in the city of Yogyakarta for 5 years (2010-2014). This study used the ecological study design with spatial-temporal approach. Population was the incidence of dengue for the period 2010-2014 in the administrative area of Yogyakarta city. Spearman-rho correlation test showed that the pattern of the relationship of DHF incidence was more significant (p <0.05) and had a stronger correlation coefficient with an increase in weather variables in the previous few months. Rainfall in the previous two months (r = 0.5617), air temperature three months earlier (r = 0.4399), and humidity in the previous month (r = 0.6097) had a positive relationship pattern with an increase in the incidence of DHF. Wind speed is negatively related to the incidence of DHF in the same month (r = -0.3743). Based on graph/ time-trend analysis and spatial analysis of weather variables had a relationship with the incidence of DHF in the city of Yogyakarta. The Yogyakarta City Health Office is advised to use weather data from BMKG every year in planning DHF prevention programs and determine the timing of mass mosquito eradication (PSN) activities. Keywords: Dengue, vector-borne disease, climate, temporal

scholarly journals Modelling hourly rates of lake evaporation

2010 ◽  
Vol 7 (3) ◽  
pp. 2727-2746 ◽  
Author(s):  
R. J. Granger ◽  
N. Hedstrom
Keyword(s):  
Wind Speed ◽  
Air Temperature ◽  
Land Surface ◽  
Open Water ◽  
Water Evaporation ◽  
Downwind Distance ◽  
Temperature And Humidity ◽  
Lake Evaporation ◽  
Initial Results ◽  
Land Water

Abstract. The paper presents the initial results of a field study of open water evaporation carried out on three small- to medium-sized lakes in Western and Northern Canada. Lake evaporation was measured directly using eddy covariance equipment; profiles of wind speed, air temperature and humidity were also obtained over the water surfaces. Observations were made as well over the upwind land surface. Relationships were developed between the hourly rates of lake evaporation and those significant parameters (wind speed, land-water temperature and humidity contrasts, and the downwind distance from shore). The result is a relatively simple versatile model for estimating the hourly lake evaporation rates. The model was tested using two independent datasets. Results show that the modelled evaporation follows the observed values very well; the model follows the diurnal trends and responds correctly to sudden changes in environmental conditions.

scholarly journals Hubungan Antara Kelembaban Relatif Dengan Beberapa Variabel Iklim Dengan Pendekatan Korelasi Pearson di Samudera Hindia

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Miftahuddin Miftahuddin ◽  
◽  
Ananda Pratama ◽  
Ichsan Setiawan ◽  
◽  
...  
Keyword(s):  
Climate Change ◽  
Wind Speed ◽  
Relative Humidity ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Air Temperature ◽  
Sea Surface ◽  
Aceh Province ◽  
Relationship Of ◽  
The Relationship

The earth's climate is constantly changing, it's just that climate change in the past took place naturally. But until now, climate change has been very closely related to human activity, so the nature of the event has become faster and more drastic. Relative humidity is a parameter that can affect climate change in Indonesia, especially in Aceh Province. Aceh province is one of the provinces located on the island of Sumatra and directly facing the Indian Ocean. Thus, Aceh Province has a considerable impact on climate change. Changes in relative humidity will lead to changes in climate elements. There are several climate elements including air temperature, rainfall, sea surface temperature, wind speed, solar radiation, and dynamic altitude. One of the methods used to look at the relationship of each climate element is the Correlation method. The purpose of this study is to find out the relationship of each variable of the climate elements. The results showed that the relationship between variables X1 (air temperature) and X3 (sea surface temperature) had the highest closeness relationship with a positive correlation value of 0.77. The lowest closeness relationships are variables X2 (rainfall) and X4 (wind speed) with a negative weak correlation value of -0.01.

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