Zobrazeno 1 - 10
of 14
pro vyhledávání: '"D. D. Komatsu"'
Autor:
D. M. Nelson, U. Tsunogai, D. Ding, T. Ohyama, D. D. Komatsu, F. Nakagawa, I. Noguchi, T. Yamaguchi
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 6381-6392 (2018)
Atmospheric nitrate deposition resulting from anthropogenic activities negatively affects human and environmental health. Identifying deposited nitrate that is produced locally vs. that originating from long-distance transport would help inform ef
Externí odkaz:
https://doaj.org/article/97c8c8d5fb564cacb3a483aa745951f9
Autor:
U. Tsunogai, T. Miyauchi, T. Ohyama, D. D. Komatsu, F. Nakagawa, Y. Obata, K. Sato, T. Ohizumi
Publikováno v:
Biogeosciences, Vol 13, Iss 11, Pp 3441-3459 (2016)
Land use in a catchment area has significant impacts on nitrate eluted from the catchment, including atmospheric nitrate deposited onto the catchment area and remineralised nitrate produced within the catchment area. Although the stable isotopic comp
Externí odkaz:
https://doaj.org/article/23519cec2d0f447daf012d208469d8d6
Autor:
U. Tsunogai, D. D. Komatsu, T. Ohyama, A. Suzuki, F. Nakagawa, I. Noguchi, K. Takagi, M. Nomura, K. Fukuzawa, H. Shibata
Publikováno v:
Biogeosciences, Vol 11, Iss 19, Pp 5411-5424 (2014)
Temporal variations in the stable isotopic compositions of nitrate dissolved in stream water eluted from a cool–temperate forested watershed (8 ha) were measured to quantify the biogeochemical effects of clear-cutting of trees and subsequent strip-
Externí odkaz:
https://doaj.org/article/ba3c58c9343a475d9af98f69c75e6569
Publikováno v:
Biogeosciences, Vol 10, Iss 6, Pp 3547-3558 (2013)
The stable isotopic compositions of nitrate dissolved in 49 brands of bottled drinking water collected worldwide were measured, to trace the fate of atmospheric nitrate (NO3− atm) that had been deposited into subaerial ecosystems, using the 17O ano
Externí odkaz:
https://doaj.org/article/482c775c23a445c78b792fa707151eff
Publikováno v:
Biogeosciences, Vol 8, Iss 3, Pp 687-702 (2011)
The stable isotopic compositions of nitrate, including the 17O anomalies (Δ17O), were determined twice in 1 yr (June and August 2007) in the oligotrophic water column of Lake Mashu, Japan. These data were then used to quantify the geochemical dynami
Externí odkaz:
https://doaj.org/article/0e86b968c0bc4f3fbf283d277b0fe799
Autor:
Y.-J. Eum, T. Matsui, A. Tsuda, F. Nakagawa, S. Daita, D. D. Komatsu, U. Tsunogai, U. Konno, K. Suzuki
Publikováno v:
Biogeosciences, Vol 7, Iss 8, Pp 2369-2377 (2010)
Using the 15N2 tracer method and high-sensitivity δ15N analytical systems, we determined N2 fixation rates for ocean samples by dividing them into particulate (>0.7 μm) and filtrate (2 fixation in the filtrate fraction had been ignored in previous
Externí odkaz:
https://doaj.org/article/deb221c0562b4014a5f269e4d3ad0273
Tracing the fate of atmospheric nitrate deposited onto a forest ecosystem in Eastern Asia using Δ17O
Publikováno v:
Atmospheric Chemistry and Physics, Vol 10, Iss 4, Pp 1809-1820 (2010)
The stable isotopic compositions of nitrate in precipitation (wet deposition) and groundwater (spring, lake, and stream water) were determined for the island of Rishiri, Japan, so as to use the 17O anomalies (Δ17O) to trace the fate of atmospheric n
Externí odkaz:
https://doaj.org/article/2e4b36cd760948579e739644997d61bf
Publikováno v:
Biogeosciences, Vol 8, Iss 3, Pp 687-702 (2011)
The stable isotopic compositions of nitrate, including the 17O anomalies (Δ17O), were determined twice in 1 yr (June and August 2007) in the oligotrophic water column of Lake Mashu, Japan. These data were then used to quantify the geochemical dynami
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::0aca348aaf89b938bfbdce71a6028a8e
https://www.biogeosciences.net/8/687/2011/
https://www.biogeosciences.net/8/687/2011/
Publikováno v:
Rapid communications in mass spectrometry : RCM. 24(7)
We have developed a rapid, sensitive, and automated analytical system to simultaneously determine the concentrations and stable isotopic compositions (delta(15)N, delta(18)O, and delta(13)C) of nanomolar quantities of nitrous oxide (N(2)O) and methan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::2610164d79ebc202150c3ed3669cb0b6
https://pubmed.ncbi.nlm.nih.gov/20213700
https://pubmed.ncbi.nlm.nih.gov/20213700
Autor:
U. Konno, U. Tsunogai, D. D. Komatsu, S. Daita, F. Nakagawa, A. Tsuda, T. Matsui, Y.-J. Eum, K. Suzuki
Using the 15N2 tracer method and high-sensitivity δ15N analytical systems, we determined N2 fixation rates by dividing fractions into particulate organic nitrogen (PON: >0.7 μm) and dissolved organic nitrogen (DON
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3273b15e4882d4921e7202dacc3627af
https://doi.org/10.5194/bgd-7-765-2010
https://doi.org/10.5194/bgd-7-765-2010