A database of water and heat observations over grassland in the north-east of Japan
<p>A highly valuable database of long-term hydrometeorological measurements is presented, containing in situ observations for a period of 37 years from a well-maintained grassland in the north-east of Japan. The observations include shortwave radiation, net radiation, air and dew point tempera...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2018-12-01
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| Series: | Earth System Science Data |
| Online Access: | https://www.earth-syst-sci-data.net/10/2295/2018/essd-10-2295-2018.pdf |
| _version_ | 1818337847288004608 |
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| author | W. Ma J. Asanuma J. Asanuma J. Xu Y. Onda Y. Onda |
| author_facet | W. Ma J. Asanuma J. Asanuma J. Xu Y. Onda Y. Onda |
| author_sort | W. Ma |
| collection | DOAJ |
| description | <p>A highly valuable database of long-term hydrometeorological measurements is
presented, containing in situ observations for a period of 37 years from a
well-maintained grassland in the north-east of Japan. The observations
include shortwave radiation, net radiation, air and dew point temperatures at
three elevations, soil temperature at four depths, sensible heat flux, soil
heat flux, wind speed, relative humidity, air pressure and precipitation. The
heights of measurements are 1.6, 12.5 and 29.5 m above ground, with the
soil-layer observations at depths of 0.02, 0.1, 0.5 and 1 m. This
high-quality database includes four temporal resolutions of 10 s, 0.5 h,
1 h and 24 h, with the hourly data
presented here. Monthly and annual statistics are presented at the database
web page of the Center for Research in Isotopes and Environmental Dynamics
and Prediction of the University of Tsukuba,
<span class="uri">http://doi.org/10.24575/0001.198108</span>. We validated the data by comparing
them with published data from the local meteorological agency in Tateno operated
by the Japan Metrological Agency, including the average, maximum and minimum
values of air temperature, shortwave radiation, wind speed, relative
humidity and precipitation. We have generated a daily downward longwave
radiation time series with a method developed by Kondo and Xu (1997) based on
the observations from the database. This constructed time series agrees well
with observations collected between 2002 and 2006, as evaluated based on the
values of the Nash–Sutcliffe efficiency (<span class="inline-formula">=0.947</span>) and percent bias (<span class="inline-formula">=1.486</span>). For the whole database, annually averaged values show a positive
trend in precipitation, air temperature, shortwave radiation, net radiation
and sensible heat flux over the past 37 years, with a negative trend detected
for wind speed, soil heat flux and soil temperature.</p> |
| first_indexed | 2024-12-13T15:01:43Z |
| format | Article |
| id | doaj.art-fb84ec6fbcdb460f8cfac0f4abb33989 |
| institution | Directory Open Access Journal |
| issn | 1866-3508 1866-3516 |
| language | English |
| last_indexed | 2024-12-13T15:01:43Z |
| publishDate | 2018-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth System Science Data |
| spelling | doaj.art-fb84ec6fbcdb460f8cfac0f4abb339892022-12-21T23:41:07ZengCopernicus PublicationsEarth System Science Data1866-35081866-35162018-12-01102295230910.5194/essd-10-2295-2018A database of water and heat observations over grassland in the north-east of JapanW. Ma0J. Asanuma1J. Asanuma2J. Xu3Y. Onda4Y. Onda5Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Tsukuba, 305-8577, JapanCenter for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Tsukuba, 305-8577, JapanFaculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8577, JapanCollege of Business Administration, Kanto Gakuin University, Yokohama, 236-0037, JapanCenter for Research in Isotopes and Environmental Dynamics, University of Tsukuba, Tsukuba, 305-8577, JapanFaculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8577, Japan<p>A highly valuable database of long-term hydrometeorological measurements is presented, containing in situ observations for a period of 37 years from a well-maintained grassland in the north-east of Japan. The observations include shortwave radiation, net radiation, air and dew point temperatures at three elevations, soil temperature at four depths, sensible heat flux, soil heat flux, wind speed, relative humidity, air pressure and precipitation. The heights of measurements are 1.6, 12.5 and 29.5 m above ground, with the soil-layer observations at depths of 0.02, 0.1, 0.5 and 1 m. This high-quality database includes four temporal resolutions of 10 s, 0.5 h, 1 h and 24 h, with the hourly data presented here. Monthly and annual statistics are presented at the database web page of the Center for Research in Isotopes and Environmental Dynamics and Prediction of the University of Tsukuba, <span class="uri">http://doi.org/10.24575/0001.198108</span>. We validated the data by comparing them with published data from the local meteorological agency in Tateno operated by the Japan Metrological Agency, including the average, maximum and minimum values of air temperature, shortwave radiation, wind speed, relative humidity and precipitation. We have generated a daily downward longwave radiation time series with a method developed by Kondo and Xu (1997) based on the observations from the database. This constructed time series agrees well with observations collected between 2002 and 2006, as evaluated based on the values of the Nash–Sutcliffe efficiency (<span class="inline-formula">=0.947</span>) and percent bias (<span class="inline-formula">=1.486</span>). For the whole database, annually averaged values show a positive trend in precipitation, air temperature, shortwave radiation, net radiation and sensible heat flux over the past 37 years, with a negative trend detected for wind speed, soil heat flux and soil temperature.</p>https://www.earth-syst-sci-data.net/10/2295/2018/essd-10-2295-2018.pdf |
| spellingShingle | W. Ma J. Asanuma J. Asanuma J. Xu Y. Onda Y. Onda A database of water and heat observations over grassland in the north-east of Japan Earth System Science Data |
| title | A database of water and heat observations over grassland in the north-east of Japan |
| title_full | A database of water and heat observations over grassland in the north-east of Japan |
| title_fullStr | A database of water and heat observations over grassland in the north-east of Japan |
| title_full_unstemmed | A database of water and heat observations over grassland in the north-east of Japan |
| title_short | A database of water and heat observations over grassland in the north-east of Japan |
| title_sort | database of water and heat observations over grassland in the north east of japan |
| url | https://www.earth-syst-sci-data.net/10/2295/2018/essd-10-2295-2018.pdf |
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