Publications

Publications Found: 22
8 Million Phenological And Sky Images From 29 Ecosystems From The Arctic To The Tropics: The Phenological Eyes Network
Nagai, S., Akitsu, T., Saitoh, T. M., Busey, R. C., Fukuzawa, K., Honda, Y., Ichie, T., Ide, R., Ikawa, H., Iwasaki, A., Iwao, K., Kajiwara, K., Kang, S., Kim, Y., Khoon, K. L., Kononov, A. V., Kosugi, Y., Maeda, T., Mamiya, W., Matsuoka, M., Maximov, T. C., Menzel, A., Miura, T., Mizunuma, T., Morozumi, T., Motohka, T., Muraoka, H., Nagano, H., Nakai, T., Nakaji, T., Oguma, H., Ohta, T., Ono, K., Pungga, R. A., Petrov, R. E., Sakai, R., Schunk, C., Sekikawa, S., Shakhmatov, R., Son, Y., Sugimoto, A., Suzuki, R., Takagi, K., Takanashi, S., Tei, S., Tsuchida, S., Yamamoto, H., Yamasaki, E., Yamashita, M., Yoon, T. K., Yoshida, T., Yoshimura, M., Yoshitake, S., Wilkinson, M., Wingate, L., Nasahara, K. N.

We report long-term continuous phenological and sky images taken by time-lapse cameras through the Phenological Eyes Network (http://www.pheno-eye.org. Accessed 29 May 2018) in various ecosystems from the Arctic to the tropics. Phenological images are useful in recording the year-to-year variability in the timing of flowering, leaf-flush, …


Journal: Ecological Research, Volume : (2018). DOI: 10.1007/s11284-018-1633-x Sites: US-Prr

Temporal Dynamics Of Aerodynamic Canopy Height Derived From Eddy Covariance Momentum Flux Data Across North American Flux Networks
Chu, H., Baldocchi, D. D., Poindexter, C., Abraha, M., Desai, A. R., Bohrer, G., Arain, M. A., Griffis, T., Blanken, P. D., O'Halloran, T. L., Thomas, R. Q., Zhang, Q., Burns, S. P., Frank, J. M., Christian, D., Brown, S., Black, T. A., Gough, C. M., Law, B. E., Lee, X., Chen, J., Reed, D. E., Massman, W. J., Clark, K., Hatfield, J., Prueger, J., Bracho, R., Baker, J. M., Martin, T. A.

Aerodynamic canopy height (ha) is the effective height of vegetation canopy for its influence on atmospheric fluxes and is a key parameter of surface‐atmosphere coupling. However, methods to estimate ha from data are limited. This synthesis evaluates the applicability and robustness of the calculation of ha from eddy covariance …


Journal: Geophysical Research Letters, Volume 45: 9275–9287 (2018). DOI: 10.1029/2018GL079306 Sites: BR-Sa1, BR-Sa3, CA-Ca1, CA-Ca2, CA-Ca3, CA-Cbo, CA-ER1, CA-Gro, CA-Man, CA-NS1, CA-NS2, CA-NS3, CA-NS4, CA-NS5, CA-Oas, CA-Obs, CA-Ojp, CA-Qfo, CA-TP1, CA-TP3, CA-TP4, CA-TPD, US-Blo, US-Bn1, US-Bn2, US-Br1, US-Br3, US-Ced, US-CPk, US-CRT, US-Dix, US-Dk2, US-Dk3, US-Fmf, US-Fuf, US-GBT, US-GLE, US-GMF, US-Ha1, US-Ha2, US-Ho2, US-Ho3, US-IB1, US-IB2, US-KL1, US-KL2, US-KL3, US-KM1, US-KM2, US-KM3, US-KM4, US-Me2, US-Me3, US-Me4, US-Me5, US-Me6, US-MMS, US-MRf, US-NC1, US-NC2, US-Ne1, US-Ne2, US-Ne3, US-NR1, US-Oho, US-Prr, US-Ro1, US-Ro3, US-SB1, US-Shd, US-Skr, US-Slt, US-SP1, US-SP2, US-SP3, US-SRM, US-Srr, US-Syv, US-Ton, US-Tw3, US-Twt, US-UMB, US-UMd, US-Var, US-Vcm, US-WBW, US-Wi0, US-Wi1, US-Wi3, US-Wi4, US-Wi5, US-Wi8, US-Wi9, US-Wrc

Variations In Bacterial And Archaeal Communities Along Depth Profiles Of Alaskan Soil Cores
Tripathi, B. M., Kim, M., Kim, Y., Byun, E., Yang, J., Ahn, J., Lee, Y. K.

Understating the microbial communities and ecological processes that influence their structure in permafrost soils is crucial for predicting the consequences of climate change. In this study we investigated the bacterial and archaeal communities along depth profiles of four soil cores collected across Alaska. The bacterial and archaeal …


Journal: Scientific Reports, Volume 8 (1): (2018). DOI: 10.1038/s41598-017-18777-x Sites: US-Prr

Seasonal patterns of canopy photosynthesis captured by remotely sensed sun-induced fluorescence and vegetation indexes in mid-to-high latitude forests: A cross-platform comparison
Xinchen Lu , Xiao Cheng, Xianglan Li Jiquan Chen, Minmin Sun, Ming Ji, Hong He, Siyu Wang, Sen Li, Jianwu Tang

Characterized by the noticeable seasonal patterns of canopy photosynthesis, mid-to-high latitude forests are sen- sitive to climate change and crucial for understanding the global carbon cycle. To monitor the seasonal cycle of the canopy photosynthesis from space, several remotely sensed indexes, such as normalized difference vegeta- …


Journal: Science of the Total Environment, Volume 644: 439-451 (2018). DOI: org/10.1016/j.scitotenv.2018.06.269 Sites: US-Prr

In Situ Observations Reveal How Spectral Reflectance Responds To Growing Season Phenology Of An Open Evergreen Forest In Alaska
Kobayashi, H., Nagai, S., Kim, Y., Yang, W., Ikeda, K., Ikawa, H., Nagano, H., Suzuki, R.

Plant phenology timings, such as spring green-up and autumn senescence, are essential state information characterizing biological responses and terrestrial carbon cycles. Current efforts for the in situ reflectance measurements are not enough to obtain the exact interpretation of how seasonal spectral signature responds to phenological …


Journal: Remote Sensing, Volume 10 (7): 1071 (2018). DOI: doi:10.3390/rs10071071 Sites: US-Prr

Extremely Dry Environment Down-Regulates Nighttime Respiration Of A Black Spruce Forest In Interior Alaska
Nagano, H., Ikawa, H., Nakai, T., Matsushima-Yashima, M., Kobayashi, H., Kim, Y., Suzuki, R.


Journal: Agricultural And Forest Meteorology, Volume 249: 297-309 (2018). DOI: 10.1016/j.agrformet.2017.11.001 Sites: US-Prr

Regional Climate Model Simulation Of Surface Moisture Flux Variations In Northern Terrestrial Regions
Fischer, R., Walsh, J. E., Euskirchen, E. S., Bieniek, P. A.

The wetness of high-latitude land surfaces is strongly dependent on the dif- ference between precipitation (P) and evapotranspiration (ET). If climate models are to capture the trajectory of surface wetness in high latitudes, they must be able to simulate the seasonality and variations of the surface moisture fluxes, as well as the …


Journal: Atmospheric And Climate Sciences, Volume 08 (01): 29-54 (2018). DOI: 10.4236/acs.2018.81003 Sites: US-Prr

Links Between Annual Surface Temperature Variation And Land Cover Heterogeneity For A Boreal Forest As Characterized By Continuous, Fibre-Optic Dts Monitoring
Saito, K., Iwahana, G., Ikawa, H., Nagano, H., Busey, R. C.

A fibre-optic DTS (distributed temperature sensing) system using Raman-scattering optical time domain reflectometry was deployed to monitor a boreal forest research site in the interior of Alaska. Surface temperatures range between −40°C in winter and 30°C in summer at this site. In parallel experiments, a fibre-optic cable sensor …


Journal: Geoscientific Instrumentation, Methods And Data Systems, Volume 7 (3): 223-234 (2018). DOI: 10.5194/gi-7-223-2018 Sites: US-Prr

Trapped Greenhouse Gases In The Permafrost Active Layer: Preliminary Results For Methane Peaks In Vertical Profiles Of Frozen Alaskan Soil Cores
Byun, E., Yang, J., Kim, Y., Ahn, J.

Copyright © 2016 John Wiley & Sons, Ltd.Degradation of organic carbon stored in permafrost may represent an additional source of atmospheric greenhouse gases (GHGs) in a warming climate. However, there is no clear understanding of how seasonal freeze–thaw affects gas permeability and emission of methane in permafrost soils, …


Journal: Permafrost And Periglacial Processes, Volume 28 (2): 477-484 (2017). DOI: 10.1002/ppp.1935 Sites: US-Prr

Trapped Greenhouse Gases In The Permafrost Active Layer: Preliminary Results For Methane Peaks In Vertical Profiles Of Frozen Alaskan Soil Cores
Byun, E., Yang, J., Kim, Y., Ahn, J.

Copyright © 2016 John Wiley & Sons, Ltd.Degradation of organic carbon stored in permafrost may represent an additional source of atmospheric greenhouse gases (GHGs) in a warming climate. However, there is no clear understanding of how seasonal freeze–thaw affects gas permeability and emission of methane in permafrost soils, …


Journal: Permafrost And Periglacial Processes, Volume 28 (2): 477-484 (2017). DOI: 10.1002/ppp.1935 Sites: US-Prr