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Archive of the surveys in Alaska






Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

[ Activities | Data ]

Activities (活動)


  1. Hobara S, Kushida K, Kim Y, Koba K, Lee B-Y, Ae N. 2016. Relationships among pH, minerals, and carbon in soils from tundra to boreal forest across Alaska. Ecosystems 19: 1092-1103
    Doi: 10.1007/s10021-016-9989-7 (IF = 3.751 in 2015). Credit: IARC-JAXA
  2. Iwahana G, Harada K, Uchida M, Tsuyuzaki S, Saito K, Narita K, Kushida K, Hinzman L. 2016. Geomorphological and geochemistry changes in permafrost after the 2002 wildfire in Kougarok, Seward Peninsula, Alaska. Journal of Geophysical Research – Earth Surface 121: 1697-1715
    Doi: 10.1002/2016JF003921 (IF = 3.318 in 2015). Credit: IARC-JAXA
  3. Kim Y, Lee B-Y, Suzuki R, Kushida K. 2016. Spatial characteristics of ecosystem respiration in three tundra ecosystems of Alaska. Polar Science 10: 356-363
    Doi: org/10.1016/j.polar.2015.12.001 (IF = 1.157 in 2016). Credit: IARC-JAXA
  4. Ikawa H, Nakai T, Busey RC, Kim Y, Kobayashi H, Nagai S, Ueyama M, Saito K, Nagano H, Suzuki R, Hinzman L. 2015. Understory CO2, sensible heat, and latent heat fluxes in a black spruceforest in interior Alaska. Agricultural and Forest Meteorology 214/215: 80-90
    Doi: 10.16/j.agrformet.2015.08.247 (IF = 3.76), Credit: JAXA
  5. Kushida K, Hobara S, Tsuyuzaki S, Kim Y, Watanabe M, Setiawan Y, Harada K, Shaver GR & Fukuda M. 2015. Spectral indices for remote sensing of phytomass, deciduous shrubs, and productivity in Alaskan arctic tundra. International Journal of Remote Sensing 36: 4344-4362
    Doi: 10.1080/01431161.2015.1080878 (IF = 1.65 in 2015), Credit: IARC/JAXA
  6. Narita K, Harada K, Saito K, Sawada Y, Fukuda M & Tsuyuzaki S. 2015. Vegetation and permafrost thaw depth ten years after a tundra fire in 2002, Seward Peninsula, Alaska. Arctic, Antarctic, and Alpine Research 47: 547-559
    Doi: 10.1657/AAAR0013-031 (IF = 1.52 in 2015), Credit: IARC/JAXA
  7. Kim Y, Kodama Y, Shim C, Kushida K. 2014. Carbon exchange rates in Polytrichum juniperinum moss of burned black spruce forest in interior Alaska. Polar Science 8: 146-155
    Doi: 10.1016/j.polar.2014.01.003, Credit: IJIS/JAXA
  8. Tsuyuzaki S, Narita K, Sawada Y, Kushida K. 2014. The establishment patterns of tree seedlings are determined immediately after wildfire in a black spruce (Picea mariana) forest. Plant Ecology 215: 327-337
    Doi: 10.1080/02827581.2013.793387 (IF = 1.53 in 2012), Credit: IJIS/ JAXA
  9. Makoto K, Tani H, Kamata N. 2013. High-resolution multispectral satellite image and post-fire ground survey reveal the pre-fire beetle damage on snags in southern Alaska. Scandinavian Journal of Forest Research 28: 581-585
    10.1080/02827581.2013.793387 (IF = 1.20 in 2011), Credit: IJIS/ JAXA
  10. Hobara S, Koba K, Ae N, Giblin AE, Kushida K, Shaver GR 2013. Geochemical influences on solubility of soil organic carbon in arctic tundra ecosystems. Soil Science Society of America Journal 77: 473-481
    Doi: 10.2136/sssaj2012.0199 (IF = 1.98 in 2011), Credit: JAXA
  11. Makoto K, Kamata N, Kamibayashi N, Koike T, Tani H. 2013. Bark-beetle-attacked trees produced more charcoal than unattacked trees during a forest fire on the Kenai Peninsula, Southern Alaska. Scandinavian Journal of Forest Research 27: 30-35
    Doi: 10.1080/02827581.2011.619566 (IF = 1.20 in 2011), Credit: IJIS/ JAXA
  12. Tsuyuzaki S, Narita K, Sawada Y, Harada K. 2013. Recovery of forest-floor vegetation after a wildfire in a Picea mariana forest. Ecological Research 28: 1061-1068
    Doi: 10.1007/s11284-013-1087-0 (IF = 1.55 in 2012), Credit: IARC/JAXA
  1. Watanabe M, Kadosaki K, Kim Y, Ishikawa M, Kushida K, Sawada Y, Tadono T, Fukuda M, Sato M. 2012. Analysis of the sources of variation in L-band backscatter from terrains with permafrost. IEEE Transactions on Geoscience and Remote Sensing 50: 44-54
    Doi: 10.1109/TGRS.2011.2159843 (IF = 1.82), Credit: JAXA
  2. Noguchi K, Dannoura M, Jomura M, Awazuhara-Noguchi Y, Matsuura Y. 2012. High belowground biomass allocation in an upland black spruce (Picea mariana) stand in interior Alaska. Polar Science 6: 133-140
    Doi: 10.1016/j.polar.2011.12.002 (IF = N/A), Credit: JAXA
  3. Saito K. 2012. Modeling freezing and thawing of subsurface soil layers for global climate models. In: Druyan LM (ed.). Climate Models, InTech, Rijeka. pp. 209-230
    Doi: 10.5772/32863 (ISBN 978-953-51-0135-2). Credit: IRAC-JAXA
  4. Saito K, Yamaguchi S, Iwata H, Harazono Y, Kosugi K, Lehning M, Shulski M. 2012. Climatic physical snowpack properties for large-scale modeling examined by observations and a physical model. Polar Science 6: 79-95
    Doi: 10.1016/j.polar.2012.02.003 (IF = N/A), Credit: IJIS
  5. Chikita KA, Wada T, Kudo I, Kim Y. 2012. The intra-annual variability of discharge, sediment load and chemical flux from the monitoring: The Yukon River, Alaska. Journal of Water Resource and Protection 4: 173-179
    Doi: 10.4236/jwarp.2012.44020 (IF = 0.41 in 2011), Credit: IARC/JAXA
  6. Iwata H, Ueyama M, Harazono Y, Tsuyuzaki S, Kondo M, Uchida M. 2011. Quick recovery of carbon dioxide exchanges in a burned black spruce forest in interior Alaska. SOLA 7: 105-108
    Doi: 10.2151/sola.2011-027 (IF = 1.29 in 2011), Credit: IARC/JAXA/NSF
  7. Farukh MF, Hayasaka H, Kimura K. 2011. Recent anomalous lightning occurrence in Alaska -the case of June 2005-. Journal of Disaster Research 6: 321-330
    Doi: N/A, (IF = N/A), Credit = IARC/ JAXA
  8. Farukh MF, Hayasaka H, Kimura K. 2011. Characterization of lightning occurrence in Alaska using various weather indices for lightning forecasting. Journal of Disaster Research 6: 343-355
    Doi: N/A, (IF = N/A), Credit = IARC/JAXA
  9. Wada T, Chikita KA, Kim Y, Kudo I. 2011. Glacial effects on discharge and sediment load in the Subarctic Tanana River Basin, Alaska. Arctic, Antarctic, and Alpine Research 43: 632-648
    Doi: 10.1657/1938-4246-43.4.632 (IF = 1.32 in 2011), Credit = IARC/JAXA
  10. Chikita KA, Kaminaga R, Kudo I, Wada T, Kim Y. 2009. Parameters determining water temperature of a proglacial stream: the Phelan Creek and the Gulkana Glacier, Alaska. River Research and Applications 26: 995-1004
    Doi: 10.1002/rra.1311 (IF = 2.03 in 2011), Credit: IARC/JAXA
  11. Tsuyuzaki S, Kushida K, Kodama Y. 2009. Recovery of surface albedo and plant cover after wildfire in a Picea mariana forest in interior Alaska. Climatic Change 93: 517-525
    Doi: 10.1007/s10584-008-9505-y (IF = 3.64 in 2009), Credit: IARC/JAXA/JSPS
  12. Kushida K, Kim Y, Tsuyuzaki S, Fukuda M. 2009. Spectral vegetation indices for estimating shrub cover, green phytomass and leaf turnover in a sedge-shrub tundra. International Journal of Remote Sensing 30: 1651-1658
    Doi: 10.1080/014311608 02502632 (IF = 1.12 in 2011), Credit: IARC/JAXA
  13. Tsuyuzaki S, Sawada Y, Kushida K, Fukuda M. 2008. A preliminary report on the vegetation zonation of palsas in the Arctic National Wildlife Refuge, northern Alaska, USA. Ecological Research 23: 787-793
    Doi: 10.1007/s11284-007-0437-1 (IF = 1.21 in 2008), Credit: IARC/JAXA/JSPS


Authors in green: members in the Japan side of IJIS-JAXA terrestrial research
IF: impact factor

Data (データ)


Slowly progressed

Collected dataLocationDesignPeriodIntervalToolsScaleFile nameContactRemarks
vegetaionPoker Flatslope05-pr.every summer96 1 × 1 m plotscrude_ Poker_ Flat_ quadrat.xlsxTsuyuzaki
tree ring Poker Flat slope 05 summer tree borer ca 30 Picea mariana crude_ Poker_ Flat_ treecore.xlsx Tsuyuzaki 30 cm high from the base
seedlng biomass Poker Flat bottom of slope 07 summer Delta-V random crude_ Poker_ Flat_ biomass.xlsx Tsuyuzaki Picea, Betula, and Salix → allometry. C, N, δN, δC
tree census Poker Flat slope 05 summer 16 10 m × 10 m plots crude_ Poker_ Flat_ plot.xlsx Tsuyuzaki including dead stems / fallen logs are recorded every year
seed dispersal Poker Flat slope 05-09 summer (+ spring 05/06) seed trap two traps in each of 16 10 m × 10 m plots crude_ Poker_ Flat_ seed trap.xlsx Tsuyuzaki Picea mariana
seedling Poker Flat slope 05-pr. summer (+ spring 05/06) 96 1 m × 1 m plots crude_ Poker_ Flat_ seedling.xlsx Tsuyuzaki
canopy openness Poker Flat slope 05/08 summer (+ spring 05/06) fish-eye lens (nikon coolpix) 96 1 m × 1 m plots crude_ Poker_ Flat_ fisheye.xlsx Tsuyuzaki
rotten degree on dead stems Poker Flat slope 05-10 summer (+ spring 05/06) soil hardiness tester (daiki pushcone) 16 10 m × 10 m plots (3-9 points on each tree) crude_ Poker_ Flat_ hardiness. xlsx Tsuyuzaki
litter decomposition of Sphagnum Poker Flat bottom of slope 08-10 every summer Delta-V 16 10 m × 10 m plots crude_ Poker_ Flat_ biomass. xlsx Tsuyuzaki spreadsheet litterbag
+ C, N, δC, δN
vegetation Poker Flat top, middle and bottom of slope summer 07 50 cm × 50 cm at 5 m intervals along lines crude_ Poker_ Flat_ ED. xlsx Tsuyuzaki same with electric detection
C/N in plants, δC, δN Poker Flat bottom of slope summer 12 Delta-V random crude_ Poker_ Flat_ ED. xlsx Tsuyuzaki 9 dominant species
environments Poker Flat various 05-pr. various various crude_ Poker _Flat_ environment. xlsx Tsuyuzaki aggregative data, different fire severity
soil temperature / moisture Poker Flat slope 05-pr. Sawada
DC resistivity soundings Poker Flat slope 06, 09 Sawada
spectral reflectance Poker Flat slope 06, 09 Kushida 350-2500 nm
climatic conditions Poker Flat ridge 05-10 weather station Kodama
CO2 efflux Poker Flat slope 05-pr. CO2 chamber Kodama
albedoPoker Flatslope05-10, 13albedo meter16 10 m × 10 m plotscrude_ Poker_ Flat_ albedo. xlsxKodama
vegetation Dalton Highway 8 sites 14 summer N/A yet Tsuyuzaki Fairbanks - Prudhoe Bay
soil hydrology Dalton Highway 8 sites 14 summer soil_ds.xlsx, soil_pr.xlsx Saito Fairbanks - Prudhoe Bay
soil physical properties Kougarok* 4 sites* 09, 10, 12 every summer KD2Pro (thermal property), HydroSense (soil moisture), thermister pits of typical soil characteristics at each site N/A yet Saito Also recorded soil types,and organic carbon contents
Tg/water content Kougarok 4 sites 06-pr. 1 hour Hobo U12-006 datalogger N/A yet Harada 0 and 30 cm cm in depths
snow depth Kougarok 4 sites 06-pr. 1 hour Hobo U12-006 datalogger N/A yet Harada
thaw depth Kougarok 4 sites 06-pr. every summer thaw probe 10m × 10m N/A yet Harada
surface roughness Kougarok 4 sites 10-pr. every summer laser pointer 30-50 m lines N/A yet Harada
resistivity profile Kougarok 4 sites 06, 13 every summer SYSCAL Jr., McOHM-2115 2D: 30m lines 9 m deep N/A yet Harada
resistivity profile Kougarok 4 sites 06 every summer SYSCAL Jr. 1D, 50 m deep N/A yet Harada
resistivity profile Kougarok 4 sites 05 every summer PROTEM 100 m deep N/A yet Harada
resistivity profileKougarok4 sites06, 07, 12, 13every summerSYSCAL Jr., HandyARM, McOHM-21151D: 30m line 1m deepN/A yetHarada
Tg, water content, thermal conductivityKougarok4 sites06, 07every summervariousup to 40cm deepN/A yetHarada
vegetationKougarok4 sites06-pr.every summer44 points 1 m × 1 m plotkougarok_ veg.xlsNarita
vegetationKougarok2 sites13summerpolygon.xlsxTsuyuzakiburned vs unburned
soil hydrology Kougarok 2 sites 14 summer soil_ds.xlsx, soil_pr.xlsx Saito

Remarks/abbreviations:
The 4 sites mean the sites were established on the slopes of unburnt north (UN), burnt north (BN), unburnt south (US), and burnt south (BS) in Kougarok, Seward Peninsula.
Tg: ground temperature

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