scholarly journals Warm layer and cool skin corrections for bulk water temperature measurements for air-sea interaction studies

2017 ◽  
Vol 122 (8) ◽  
pp. 6470-6481 ◽  
Author(s):  
Denny P. Alappattu ◽  
Qing Wang ◽  
Ryan Yamaguchi ◽  
Richard J. Lind ◽  
Mike Reynolds ◽  
...  
Keyword(s):  
Water Temperature ◽  
Bulk Water ◽  
Temperature Measurements ◽  
Cool Skin ◽  
Interaction Studies

scholarly journals LakeSST: Lake Skin Surface Temperature in French inland water bodies for 1999–2016 from Landsat archives

2018 ◽  
Vol 10 (2) ◽  
pp. 727-743 ◽  
Author(s):  
Jordi Prats ◽  
Nathalie Reynaud ◽  
Delphine Rebière ◽  
Tiphaine Peroux ◽  
Thierry Tormos ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Water Temperature ◽  
Skin Surface ◽  
Water Bodies ◽  
Temperature Measurements ◽  
Skin Surface Temperature ◽  
Data Set ◽  
Cool Skin ◽  
Layer Effect

Abstract. The spatial and temporal coverage of the Landsat satellite imagery make it an ideal resource for the monitoring of water temperature over large territories at a moderate spatial and temporal scale at a low cost. We used Landsat 5 and Landsat 7 archive images to create the Lake Skin Surface Temperature (LakeSST) data set, which contains skin water surface temperature data for 442 French water bodies (natural lakes, reservoirs, ponds, gravel pit lakes and quarry lakes) for the period 1999–2016. We assessed the quality of the satellite temperature measurements by comparing them to in situ measurements and taking into account the cool skin and warm layer effects. To estimate these effects and to investigate the theoretical differences between the freshwater and seawater cases, we adapted the COARE 3.0 algorithm to the freshwater environment. We also estimated the warm layer effect using in situ data. At the reservoir of Bimont, the estimated cool skin effect was about −0.3 and −0.6 °C most of time, while the warm layer effect at 0.55 m was negligible on average, but could occasionally attain several degrees, and a cool layer was often observed in the night. The overall RMSE of the satellite-derived temperature measurements was about 1.2 °C, similar to other applications of satellite images to estimate freshwater surface temperatures. The LakeSST data can be used for studies on the temporal evolution of lake water temperature and for geographical studies of temperature patterns. The LakeSST data are available at https://doi.org/10.5281/zenodo.1193745.

Modelling of summertime hydrothermal regime in the downstream pool of Krasnoyarsk hydroelectric power station

2019 ◽  
pp. 107-114
Author(s):  
Юрий Иванович Шокин ◽  
Николай Яковлевич Шапарев
Keyword(s):  
Water Temperature ◽  
Cross Section ◽  
Temperature Measurements ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Power Station ◽  
Hydrothermal Regime ◽  
Deterministic Modelling ◽  
Modelling Approach

Предлагается модель летнего гидротермического режима р. Енисей в нижнем бьефе Красноярской ГЭС на основе детерминированного подхода. На теплообмен воды с окружающей средой влияют следующие физические процессы: поглощение водой прямой и рассеянной солнечной радиации; поглощение поверхностью воды тепловой инфракрасной радиации (ТИР), исходящей из атмосферы; излучение поверхностью воды ТИР; испарительный и конвективный теплообмен. Результаты моделирования сравниваются с температурными данными, полученными с гидропостов. Here we consider the summertime hydrothermal regime in a 124-km river occurring within the interval (reach) downstream of the Krasnoyarsk HPP on July 3, 2016 based on the deterministic modelling approach. The reach area is divided by 4 cross-section lines (0.5, 40, 77, 124 km) with gauging stations at the first, second and forth section lines to measure water temperature. Temperature measurements at the gauging stations are taken at time

Water temperature measurements with a Rayleigh backscatter distributed sensor

2020 ◽  
Vol 55 ◽  
pp. 102160 ◽  
Author(s):  
David Holler ◽  
Rodolfo Vaghetto ◽  
Yassin Hassan
Keyword(s):  
Water Temperature ◽  
Temperature Measurements ◽  
Distributed Sensor

scholarly journals Assessing water conditions for Heleophryne rosei tadpoles and the conservation relevance

Koedoe ◽  
2020 ◽  
Vol 62 (1) ◽  
Author(s):  
Zishan Ebrahim ◽  
Atherton De Villiers ◽  
John Measey
Keyword(s):  
Water Temperature ◽  
Stream Flow ◽  
Environmental Water ◽  
Bulk Water ◽  
Summer Temperature ◽  
Critically Endangered ◽  
Independent Variables ◽  
Table Mountain ◽  
Perennial Stream ◽  
Threat Mitigation

The Table Mountain Ghost Frog (Heleophryne rosei) is endemic to the Table Mountain massif and is Critically Endangered. Other than clear, clean perennial stream flow, the optimal aquatic conditions required by their larvae are unknown. Dissolved oxygen, temperature, pH, electro-conductivity, aspect and permanence of flow are the independent variables measured seasonally at two sampling altitudes at 12 rivers of the massif. Using a logistic regression model we found that a permanence of water flow and lower water temperature were significant predictors of tadpole presence. Streams with mean summer temperature above 17.2 °C, at 300 m – 400 m above sea level, do not have tadpoles. Summer and autumn abstraction should be avoided, while a summer water temperature above an average of 17.2 °C is a threshold of potential concern for management authorities responsible for biodiversity conservation, threat mitigation efforts, and bulk-water supply and abstraction.Conservation implications: The Environmental Water Reserve has not been determined for streams of Table Mountain. The requirements of the Critically Endangered Table Mountain Ghost Frog (Heleophryne rosei) can be adopted as the minimum conditions to support this species and associated communities. Perennial flow, an average January water temperature of 17.2 °C or lower.

scholarly journals Measurements of water temperature in fountains as an indicator of potential secondary water pollution caused by Legionella bacteria

2018 ◽  
Vol 30 ◽  
pp. 01015
Author(s):  
Joanna Bąk
Keyword(s):  
Water Pollution ◽  
Temperature Distribution ◽  
Water Temperature ◽  
Water Contamination ◽  
Temperature Measurements ◽  
Temperature Changes ◽  
Air Temperatures ◽  
Single Temperature ◽  
Long Time ◽  
Number Of Bacteria

At high air temperatures persisting for a long time, water temperature in the fountains may also increase significantly. This can cause a sudden and significant increase in Legionella bacteria, which results in secondary water contamination. This phenomenon with water – air aerosol generated by fountains can be very dangerous for people. During the test, water temperature measurements in fountains in Poland were made. These research tests was conducted in the spring and summer. The research was conducted in order to determine whether there is a possibility of growth of Legionella bacteria. One of the aims of the study was to determine what temperature range occurs in the fountains and how the temperature changes in the basin of the fountain and when the highest temperature occurs. Single temperature measurements were made and also the temperature distribution was measured during daylight hours. The water temperature in most cases was greater than 20°C, but in no case exceed 26°C. The paper presents also the review about the effect of water temperature on the presence and bacterial growth. The study confirmed the existence of the risk of increasing the number of bacteria of the genus Legionella in the water in the fountains.

Annual temperature cycle in Cleveland Bay, Great Barrier Reef province

1981 ◽  
Vol 32 (6) ◽  
pp. 987 ◽  
Author(s):  
TA Walker
Keyword(s):  
Great Barrier Reef ◽  
Water Temperature ◽  
Air Temperature ◽  
Temperature Curve ◽  
Temperature Data ◽  
Temperature Measurements ◽  
Temperature Cycle ◽  
Barrier Reef ◽  
Deep Station ◽  
Annual Temperature Cycle

Weekly temperature measurements have been taken over a 55-month period at a 10 m deep station in Cleveland Bay. Temperature at the surface ranged from 19.3 to 30.9�C with a mean monthly minimum of 20.9�C in July and a mean monthly maximum of 29.0�C in January. The water-temperature curve lagged behind the 0900 h air-temperature curve by an average of 10 days. Differences between the present data and other published temperature data for Great Barrier Reef waters are discussed.

scholarly journals Remote Water Temperature Measurements Based on Brillouin Scattering with a Frequency Doubled Pulsed Yb:doped Fiber Amplifier

Sensors ◽  
2008 ◽  
Vol 8 (9) ◽  
pp. 5820-5831 ◽  
Author(s):  
Kai Schorstein ◽  
Alexandru Popescu ◽  
Marco Göbel ◽  
Thomas Walther
Keyword(s):  
Water Temperature ◽  
Brillouin Scattering ◽  
Fiber Amplifier ◽  
Temperature Measurements

scholarly journals Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements

2015 ◽  
Vol 4 (1) ◽  
pp. 19-22 ◽  
Author(s):  
T. O'Donnell Meininger ◽  
J. S. Selker
Keyword(s):  
Water Temperature ◽  
Diurnal Temperature Range ◽  
Fiber Optic ◽  
Stream Temperature ◽  
Temperature Sensing ◽  
Temperature Measurements ◽  
Distributed Temperature Sensing ◽  
Diurnal Temperature ◽  
Sediment Bed ◽  
Bed Materials

Abstract. Error in distributed temperature sensing (DTS) water temperature measurements may be introduced by contact of the fiber optic cable sensor with bed materials (e.g., seafloor, lakebed, streambed). Heat conduction from the bed materials can affect cable temperature and the resulting DTS measurements. In the Middle Fork John Day River, apparent water temperature measurements were influenced by cable sensor contact with aquatic vegetation and fine sediment bed materials. Affected cable segments measured a diurnal temperature range reduced by 10% and lagged by 20–40 min relative to that of ambient stream temperature. The diurnal temperature range deeper within the vegetation–sediment bed material was reduced 70% and lagged 240 min relative to ambient stream temperature. These site-specific results illustrate the potential magnitude of bed-conduction impacts with buried DTS measurements. Researchers who deploy DTS for water temperature monitoring should understand the importance of the environment into which the cable is placed on the range and phase of temperature measurements.

scholarly journals Technical Note: Bed conduction impact on fiber optic DTS water temperature measurements

2014 ◽  
Vol 4 (2) ◽  
pp. 375-384
Author(s):  
T. O'Donnell Meininger ◽  
J. S. Selker
Keyword(s):  
Water Temperature ◽  
Diurnal Temperature Range ◽  
Aquatic Vegetation ◽  
Fiber Optic ◽  
Stream Temperature ◽  
Temperature Measurements ◽  
Diurnal Temperature ◽  
Temperature Range ◽  
Sediment Bed ◽  
Bed Materials

Abstract. Error in Distributed Temperature Sensor (DTS) water temperature measurements may be introduced by contact of the fiber optic cable sensor with bed materials (e.g., seafloor, lakebed, stream bed). Heat conduction from the bed materials can affect cable temperature and the resulting DTS measurements. In the Middle Fork John Day River, apparent water temperature measurements were influenced by cable sensor contact with aquatic vegetation and fine sediment bed materials. Affected cable segments measured a diurnal temperature range reduced by 10% and lagged by 20–40 min relative to that of ambient stream temperature. The diurnal temperature range deeper within the vegetation–sediment bed material was reduced 70% and lagged 240 min relative to ambient stream temperature. These site-specific results illustrate the potential magnitude of bed-conduction impacts with buried DTS measurements. Researchers who deploy DTS for water temperature monitoring should understand the importance of the environment into which the cable is placed on the range and phase of temperature measurements.

Sign in / Sign up

Export Citation Format

Share Document