Data Set Citation:
When using this data, please cite the data package:
Akitsu T , Nakaji T , Kobayashi H , Honda Y , Bayarsaikhan U , Terigele , Hayashi M , Hiura T , Ide R , Igarashi S , Kajiwara K , Kumikawa S , Matsuoka Y , Nakano T , Nakano T , Okuda A , Sato T , Tachiiri K , Takahashi Y , Uchida J , and Nasahara K.
Large-scale ecological field data for satellite validation in deciduous forests and grasslands
ERDP-2020-16.1.2 (https://db.cger.nies.go.jp/JaLTER/metacat/metacat/ERDP-2020-16.1.2/jalter-en)
General Information:
Title:Large-scale ecological field data for satellite validation in deciduous forests and grasslands
Identifier:ERDP-2020-16.1.2
Abstract:
In-situ accurate data sets of a leaf area index (LAI), above-ground biomass (AGB), and a fraction of photosynthetically active radiation (fAPAR) are indispensable to validate and to improve ecological products obtained from satellites. In-situ data for satellite validation must be created not from a single point data but an areal data (such as multiple points data) representing a satellite footprint. Using multiple points’ data, the error in in-situ data can be calculated statistically. The quantification of the error in the in-situ data enables us to separately evaluate the discrepancy between the satellites’ products and the in-situ data as the error in the in-situ data and the estimation error in the products. Besides, the accuracy of in-situ data is required to be much higher than the accuracy of the satellite products which was officially set. To obtain such in-situ data, we have established observation sites for typical land cover types in East Asia, from temperate to cool ecosystems: deciduous needle-leaved forest (DNF), evergreen needle-leaved forest (ENF), deciduous broad-leaved forest (DBF), and grassland (GL). We conducted the observations in the 500 m × 500 m area, which is the footprint scale of the Global Change Observation Mission-Climate (GCOM-C) satellite. In this paper, the data of LAI, AGB, and fAPAR observed at DNF, DBF, and GL (i.e., except at ENF) are reported. These data are useful even for the validation of other satellite products, especially with higher spatial resolution. Also, the long-term tree census data from 2005 to 2018 at DNF are reported. The complete dataset for this abstract published in the Data Paper section of the journal is available in electronic format in the Ecological Research Data Paper Archives at http://db.cger.nies.go.jp/JaLTER/ER_DataPapers/archives/2020/ERDP-2020-16.
Keywords:
  • Satellite validation data set
  • Leaf area index
  • Above-ground biomass
  • fAPAR
  • Long-term tree census data
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:2005_2018_tree_census_FHK_Okano.csv ( View Metadata | Download File download)
Data Table:2014_2019_mean_LAI_all_sites.csv ( View Metadata | Download File download)
Data Table:2014_LAI-2000_canopy_FHK_Akitsu.csv ( View Metadata | Download File download)
Data Table:2015_2019_mean_AGB_all_sites.csv ( View Metadata | Download File download)
Data Table:2015_LAI-2000_canopy_FHK_Akitsu.csv ( View Metadata | Download File download)
Data Table:2015_LAI-2200_canopy_TOS_Akitsu.csv ( View Metadata | Download File download)
Data Table:2015_LAI_AGB_understory_clipping_TOS_Nakaji.csv ( View Metadata | Download File download)
Data Table:2016_LAI-2200_canopy_TOS_Nakaji.csv ( View Metadata | Download File download)
Data Table:2017_tree_census_TOS_Nakaji.csv ( View Metadata | Download File download)
Data Table:2017_AGB_TOS_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_2019_LAI_AGB_WTR_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_AGB_FHK_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_LAI-2200_canopy_FHK_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_LAI-2200_canopy_TOS_Nakaji.csv ( View Metadata | Download File download)
Data Table:2018_LAI-2200_understory_FHK_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_LAI-2200_understory_TOS_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_LAI_AGB_MBN_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_fAPAR_FHK_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_fAPAR_TOS_Akitsu.csv ( View Metadata | Download File download)
Data Table:2018_fAPAR_WTR_Akitsu.csv ( View Metadata | Download File download)
Data Table:2019_LAI-2200_canopy_TOS_Nakaji.csv ( View Metadata | Download File download)
Data Table:2018_mean_fAPAR_all_sites.csv ( View Metadata | Download File download)
Data Table:2019_LAI_AGB_DGT_Akitsu.csv ( View Metadata | Download File download)
Data Table:2019_LAI_AGB_KYM_Akitsu.csv ( View Metadata | Download File download)
Data Table:lat_lon_DGT.csv ( View Metadata | Download File download)
Data Table:lat_lon_MBN.csv ( View Metadata | Download File download)
Data Table:lat_lon_TOS.csv ( View Metadata | Download File download)
Data Table:lat_lon_WTR.csv ( View Metadata | Download File download)
Data Table:lat_lon_FHK.csv ( View Metadata | Download File download)
Data Table:lat_lon_KYM.csv ( View Metadata | Download File download)
Other Data:data_descriptor ( View Metadata | Download File download)

Involved Parties

Data Set Owners:
Individual: Tomoko Kawaguchi Akitsu
Organization:Faculty of Life and Environmental Sciences, University of Tsukuba
Address:
1-1-1,
Tennodai, Tsukuba 305-8572 Japan
Individual: Tatsuro Nakaji
Organization:Uryu Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
Address:
Japan
Individual: Hajime Kobayashi
Address:
Faculty of Agriculture, Shinshu University,
Japan
Individual: Yoshiaki Honda
Address:
Center for Environmental Remote Sensing, Chiba University,
Japan
Individual: Undrakh Bayarsaikhan
Organization:Graduate School of Life and Environmental Science, University of Tsukuba
Individual: Terigele
Organization:Graduate School of Life and Environmental Science, University of Tsukuba
Individual: Masato Hayashi
Organization:Earth Observation Research Center, Japan Aerospace Exploration Agency
Address:
Japan
Individual: Tsutom Hiura
Organization:Graduate School of Agricultural and Life Sciences, The University of Tokyo
Address:
Japan
Individual: Reiko Ide
Organization:Center for Global Environmental Research, National Institute for Environmental Studies
Address:
Japan
Individual: Susumu Igarashi
Organization:Tomakomai Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
Address:
Japan
Individual: Koji Kajiwara
Organization:Center for Environmental Remote Sensing, Chiba University
Address:
Japan
Individual: Syoji Kumikawa
Organization:Tomakomai Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
Address:
Japan
Individual: Yuuichi Matsuoka
Organization:Tomakomai Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
Address:
Japan
Individual: Takashi Nakano
Organization:Mount Fuji Research Institute, Yamanashi Prefectural Government
Address:
Japan
Individual: Tomoko Nakano
Organization:Faculty of Economics, Chuo University
Address:
Japan
Individual: Atsushi Okuda
Organization:Tomakomai Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
Address:
Japan
Individual: Tomoaki Sato
Organization:Tomakomai Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
Address:
Japan
Individual: Kaoru Tachiiri
Organization:Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology
Address:
Japan
Individual: Yoshiyuki Takahashi
Organization:Center for Global Environmental Research, National Institute for Environmental Studies,
Address:
Japan
Individual: Jiro Uchida
Organization:Tomakomai Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
Address:
Japan
Individual: Kenlo Nishida Nasahara
Organization:Faculty of Life and Environmental Sciences, University of Tsukuba
Address:
1-1-1,
Tennodai, Tsukuba 305-8572 Japan
Data Set Contacts:
Individual: Tomoko Kawaguchi AKITSU
Organization:Faculty of Life and Environmental Sciences, University of Tsukuba
Address:
1-1-1,
Tennodai, Tsukuba 305-8572 Japan
Email Address:
tomo.akki878@gmail.com
Individual: Tatsuro NAKAJI
Organization:Uryu Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University,
Address:
Moshiri,
Horokanai, Hokkaido 074-0741 Japan
Email Address:
nakaji@fsc.hokudai.ac.jp
Individual: Tetsuo OKANO
Organization:Faculty of Agriculture, Shinshu University,
Address:
Japan
Email Address:
teokano@shinshu-u.ac.jp
Individual: Hajime KOBAYASHI
Organization:Faculty of Agriculture, Shinshu University
Address:
Japan
Email Address:
kobaafc@shinshu-u.ac.jp
Associated Parties:
Individual: Tomoko Kawaguchi AKITSU
Organization:Faculty of Life and Environmental Sciences, University of Tsukuba
Address:
1-1-1,
Tennodai, Tsukuba 305-8572 Japan
Email Address:
tomo.akki878@gmail.com
Individual: Tatsuro NAKAJI
Organization:Uryu Experimental Forest, Field Science Center for Northern Biosphere, Hokkaido University
Address:
Moshiri,
Horokanai, Hokkaido 074-0741 Japan
Email Address:
nakaji@fsc.hokudai.ac.jp
Individual: Tetsuo OKANO
Organization:Faculty of Agriculture, Shinshu University
Address:
Japan
Email Address:
teokano@shinshu-u.ac.jp
Individual: Hajime KOBAYASHI
Organization:Faculty of Agriculture, Shinshu University,
Address:
Japan
Email Address:
kobaafc@shinshu-u.ac.jp

Data Set Characteristics

Geographic Region:
Geographic Description:Tomakomai Japan
Bounding Coordinates:
West:  142.0  degrees
East:  142.0  degrees
North:  43.0  degrees
South:  43.0  degrees
Mimimum Altitude:103.0  meter
Maximum Altitude:103.0  meter
Geographic Region:
Geographic Description:Fujihokuroku Japan
Bounding Coordinates:
West:  139.0  degrees
East:  139.0  degrees
North:  35.0  degrees
South:  35.0  degrees
Mimimum Altitude:1100.0  meter
Maximum Altitude:1100.0  meter
Geographic Region:
Geographic Description:Fujiyoshida Japan
Bounding Coordinates:
West:  139.0  degrees
East:  139.0  degrees
North:  35.0  degrees
South:  35.0  degrees
Mimimum Altitude:1030.0  meter
Maximum Altitude:1030.0  meter
Geographic Region:
Geographic Description:Watarase Japan
Bounding Coordinates:
West:  140.0  degrees
East:  140.0  degrees
North:  36.0  degrees
South:  36.0  degrees
Mimimum Altitude:16.0  meter
Maximum Altitude:16.0  meter
Geographic Region:
Geographic Description:Baganuur Mongolia
Bounding Coordinates:
West:  108.0  degrees
East:  108.0  degrees
North:  48.0  degrees
South:  48.0  degrees
Mimimum Altitude:1396.0  meter
Maximum Altitude:1396.0  meter
Geographic Region:
Geographic Description:Delgertsogt Mongolia
Bounding Coordinates:
West:  106.0  degrees
East:  106.0  degrees
North:  46.0  degrees
South:  46.0  degrees
Mimimum Altitude:1380.0  meter
Maximum Altitude:1380.0  meter
Geographic Region:
Geographic Description:Khar yamaat Mongolia
Bounding Coordinates:
West:  112.0  degrees
East:  112.0  degrees
North:  48.0  degrees
South:  48.0  degrees
Mimimum Altitude:1060.0  meter
Maximum Altitude:1060.0  meter
Time Period:
Begin:
2005
End:
2019

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:
Description:

Study sites

Large scale ecological observation was conducted at 6 observation sites (the TOS, FHK, WTR, MBN, DGT, and KYM sites, see Table 1 and Fig. 1). We selected the observation sites according to the criteria: flat topography, homogeneous vegetation cover over a 500 m × 500 m square, and accessibility. Furthermore, we conducted the observation of leaf life-span of Pinus densiflora at the FJY site (Table 1 and Fig. 2).
Step 2:
Description:

Sampling design Forest sites

Five parallel transects were placed at 100 m intervals, and each transect was 400 m long (Figs. 3a and 3b). Along each transect, observation points of a leaf area index (LAI) and a fraction of absorbed photosynthetically active radiation (fAPAR) were placed at 20 m intervals, and tree census points to observe above-ground biomass (AGB) were placed at 100 m intervals. Furthermore, litter-fall traps were placed to obtain the representative LAI in the observation area (Figs 3a and 4). At the Tomakomai (TOS) site, tree census area was established in a 1000 m2 quadrate area centered on the point. At the Fujihokuroku (FHK) site, tree census was conducted in a 200 m × 200 m area (a hatched area in Fig. 3b), where it has been conducted for a long term. It is because setting new quadrats for tree census is restricted due to the Natural Parks Law.
Step 3:
Description:

Sampling design Wet grassland site

Five parallel transects were placed at 100 m intervals, and each transect was 400 m long (Fig. 3c). Along each transect, observation points of LAI and AGB using a clipping method were placed at 100 m intervals. fAPAR observation points were selected using a random sampling method.
Step 4:
Description:

Sampling design Dry grassland sites

Five or three parallel transects were placed at 100 m or 200 m intervals, respectively, and each transect was 400 m long (Figs. 3d, 3e, and 3f). Along each transect, spectral observation points were placed at 20 m intervals. To obtain the relationship between LAI/AGB and spectral reflectance, 11 observation points for a clipping method were selected.
Step 5:
Description:

Sampling design Observation points’ name (observation point ID)

The observation point ID was defined as ABCD, where A is a transect line ID, B is a direction from the center of the line or that from the tower (E or W meaning east or west, respectively), CD (10 m) is a distance from the center of the line or that from the tower (see Fig. 3). For instance, the 3E12 indicates the observation point was located at 120 m east from the center/tower on line 3.
Step 6:
Description:

Sampling designObservation date, its method, and responsible person for each observation

LAI, AGB. fAPAR are leaf area index, above-ground biomass, and fraction of absorbed photosynthetically active radiation, respectively.

Data Set Usage Rights

The complete dataset for this abstract published in the Data Paper section of the journal is available in electronic format in the Ecological Research Data Paper Archives at http://db.cger.nies.go.jp/JaLTER/ER_DataPapers/archives/2020/ERDP-2020-16.
Access Control:
Auth System:JaLTER
Order:allowFirst
Allow: [read] public
Additional Metadata
Metadata download: Ecological Metadata Language (EML) File