Citation:

PANGAEA.988343

Name: Seawater carbonate chemistry and biodiversity of shallow-water CO2 seeps on Himeshima Island and Showa Iwojima Island, Japan
Published: 2025-12-29
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Benthos; CO2 vent; Coast and continental shelf; Community composition and diversity; Entire community; Field experiment; North Pacific; Rocky-shore community; Temperate

Always quote citation above when using data! You can download the citation in several formats below.

Published: 2025-12-29 • DOI registered: 2026-01-27

RIS Citation BibTeX Citation Text Citation ShareShow Map Google Earth

Abstract:

This study is the first to investigate two shallow-water CO2 seeps near Japan from the perspective of ocean acidification. Seawater chemical properties and composition of benthic communities were investigated.

This dataset is included in the OA-ICC data compilation maintained in the framework of the IAEA Ocean Acidification International Coordination Centre (see https://oa-icc.ipsl.fr). Original data were provided by the author of the related paper (see Related to) to the OA-ICC data curator. In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2024) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2025-12-29.

Keyword(s):

Benthos; CO2 vent; Coast and continental shelf; Community composition and diversity; Entire community; Field experiment; North Pacific; Rocky-shore community; Temperate

Related to:

Fujii, Masahiko; Ono, Tsuneo; Yamada, M; Ooue, Manabu; Ito, Takeru; Yang, Jen‑Han; Horiuchi, Yu; Oiwane, Hisashi; Wakita, Masahide; Wada, Shigeki (2025): Biogeochemical properties of shallow-water CO2 seeps on Himeshima Island and Showa Iwojima Island, Japan. Progress in Earth and Planetary Science, 12(1), 101, https://doi.org/10.1186/s40645-025-00772-w

References:

Nisumaa, Anne-Marin; Pesant, Stephane; Bellerby, Richard G J; Delille, Bruno; Middelburg, Jack J; Orr, James C; Riebesell, Ulf; Tyrrell, Toby; Wolf-Gladrow, Dieter A; Gattuso, Jean-Pierre (2010): EPOCA/EUR-OCEANS data compilation on the biological and biogeochemical responses to ocean acidification. Earth System Science Data, 2(2), 167-175, https://doi.org/10.5194/essd-2-167-2010

Yang, Yan; Brockmann, Patrick; Galdino, Carolina; Schindler, Uwe; Gazeau, Frédéric (2024): An update of data compilation on the biological response to ocean acidification and overview of the OA-ICC data portal. Earth System Science Data, 16(8), 3771-3780, https://doi.org/10.5194/essd-16-3771-2024

Yang, Yan; Hansson, L; Gattuso, Jean-Pierre (2016): Data compilation on the biological response to ocean acidification: an update. Earth System Science Data, 8(1), 79-87, https://doi.org/10.5194/essd-8-79-2016

Related code / software:

Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James; Gentili, Bernard; Hagens, Mathilde; Hofmann, Andreas; Mueller, Jens-Daniel; Proye, Aurélien; Rae, James; Soetaert, Karline (2024): seacarb: seawater carbonate chemistry with R. R package version 3.3.3. https://cran.r-project.org/web/packages/seacarb/index.html

Project(s):

Nippon Foundation Ocean Acidification Adaptation Project (OAAP)

Ocean Acidification International Coordination Centre (OA-ICC)

Funding:

Japan Society for the Promotion of Science (JSPS), grant/award no. 22H00555 : Kakenhi

Japan Society for the Promotion of Science (JSPS), grant/award no. JPJSCCA20210006 : International CO2 Natural Analogues Network (ICONA)

Coverage:

Median Latitude: 32.266210 * Median Longitude: 130.990610 * South-bound Latitude: 30.803420 * West-bound Longitude: 130.340390 * North-bound Latitude: 33.729000 * East-bound Longitude: 131.640830

Date/Time Start: 2024-08-20T00:00:00 * Date/Time End: 2024-12-02T00:00:00

Event(s):

Himeshima_CO2_seep * Latitude: 33.729000 * Longitude: 131.640830 * Date/Time Start: 2024-08-20T00:00:00 * Date/Time End: 2024-08-20T00:00:00

Showa_Iwojima_CO2_seep * Latitude: 30.803420 * Longitude: 130.340390 * Date/Time Start: 2024-12-01T00:00:00 * Date/Time End: 2024-12-02T00:00:00

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type of study	Study type		Fujii, Masahiko
2	Date	Date		Fujii, Masahiko
3	Site	Site		Fujii, Masahiko
4	Distance	Distance	m	Fujii, Masahiko		from CO2 seep
5	Coverage	Cov	%	Fujii, Masahiko		S. macrocarpum
6	Coverage	Cov	%	Fujii, Masahiko		M. myagroides
7	Coverage	Cov	%	Fujii, Masahiko		Bare rock
8	Coverage	Cov	%	Fujii, Masahiko		Crustose coralline algae
9	Coverage	Cov	%	Fujii, Masahiko		S. micracanthum
10	Coverage	Cov	%	Fujii, Masahiko		S. ringgoldianum
11	Coverage	Cov	%	Fujii, Masahiko		P. arborescens
12	Coverage	Cov	%	Fujii, Masahiko		Unidentified algae
13	Coverage	Cov	%	Fujii, Masahiko		Others
14	Coverage	Cov	%	Fujii, Masahiko		Turf algae
15	Coverage	Cov	%	Fujii, Masahiko		Corals
16	Coverage	Cov	%	Fujii, Masahiko		Low-profile algae
17	Coverage	Cov	%	Fujii, Masahiko		Urchin
18	Coverage	Cov	%	Fujii, Masahiko		White mat
19	Coverage	Cov	%	Fujii, Masahiko		Sponge
20	Coverage	Cov	%	Fujii, Masahiko		Sand
21	Salinity	Sal		Fujii, Masahiko
22	Temperature, water	Temp	°C	Fujii, Masahiko
23	pH, total scale	pHT		Fujii, Masahiko
24	Dry air column-averaged mole fraction of carbon dioxide	XCO2	ppmv	Fujii, Masahiko		dry at 1 atm
25	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Fujii, Masahiko	Calculated using CO2SYS
26	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Fujii, Masahiko	Calculated using CO2SYS
27	Bicarbonate ion	[HCO3]-	µmol/kg	Fujii, Masahiko	Calculated using CO2SYS
28	Carbonate ion	[CO3]2-	µmol/kg	Fujii, Masahiko	Calculated using CO2SYS
29	Carbon, inorganic, dissolved	DIC	µmol/kg	Fujii, Masahiko	Calculated using CO2SYS
30	Alkalinity, total	AT	µmol/kg	Fujii, Masahiko
31	Aragonite saturation state	Omega Arg		Fujii, Masahiko	Calculated using CO2SYS
32	Calcite saturation state	Omega Cal		Fujii, Masahiko	Calculated using CO2SYS
33	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
34	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
35	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
36	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
37	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
38	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
39	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
40	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
41	Calcite saturation state	Omega Cal		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

1999 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Study type	2 Date	3 Site	4 Distance [m] (from CO2 seep)	5 Cov [%] (S. macrocarpum)	6 Cov [%] (M. myagroides)	7 Cov [%] (Bare rock)	8 Cov [%] (Crustose coralline algae)	9 Cov [%] (S. micracanthum)	10 Cov [%] (S. ringgoldianum)	11 Cov [%] (P. arborescens)	12 Cov [%] (Unidentified algae)	13 Cov [%] (Others)	14 Cov [%] (Turf algae)	15 Cov [%] (Corals)	16 Cov [%] (Low-profile algae)	17 Cov [%] (Urchin)	18 Cov [%] (White mat)	19 Cov [%] (Sponge)	20 Cov [%] (Sand)	21 Sal	22 Temp [°C]	23 pHT	24 XCO2 [ppmv] (dry at 1 atm)	25 pCO2water_SST_wet [µatm] (Calculated using CO2SYS)	26 fCO2water_SST_wet [µatm] (Calculated using CO2SYS)	27 [HCO3]- [µmol/kg] (Calculated using CO2SYS)	28 [CO3]2- [µmol/kg] (Calculated using CO2SYS)	29 DIC [µmol/kg] (Calculated using CO2SYS)	30 AT [µmol/kg]	31 Omega Arg (Calculated using CO2SYS)	32 Omega Cal (Calculated using CO2SYS)	33 CSC flag (Calculated using seacarb afte...)	34 CO2 [µmol/kg] (Calculated using seacarb afte...)	35 fCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	36 pCO2water_SST_wet [µatm] (Calculated using seacarb afte...)	37 [HCO3]- [µmol/kg] (Calculated using seacarb afte...)	38 [CO3]2- [µmol/kg] (Calculated using seacarb afte...)	39 DIC [µmol/kg] (Calculated using seacarb afte...)	40 Omega Arg (Calculated using seacarb afte...)	41 Omega Cal (Calculated using seacarb afte...)
field	2024-08-20	Himeshima Island	0.0	1.212	51.859	24.860	0.000	7.918	0.000	6.114	0.000	0.141	7.896							32.428	22.992	7.89	596.76	580.53	578.63	1816.03	133.04	1966.61	2146.84	2.12	3.26	8	17.53	578.28	580.17	1817.75	133.38	1968.65	2.13	3.27
field	2024-08-20	Himeshima Island	1.0																	32.445	23.003	7.89	594.66	578.47	576.58	1815.61	133.56	1966.64	2147.71	2.13	3.27	8	17.52	578.44	580.34	1818.26	133.53	1969.31	2.13	3.27
field	2024-08-20	Himeshima Island	2.0																	32.427	23.001	7.91	572.16	556.58	554.76	1805.56	137.22	1959.59	2146.79	2.19	3.36	8	16.61	548.27	550.07	1804.56	138.69	1959.86	2.21	3.40
field	2024-08-20	Himeshima Island	3.0																	32.426	23.007	7.90	584.57	568.65	566.79	1810.76	135.12	1963.05	2146.74	2.16	3.31	8	17.06	563.08	564.93	1811.05	136.05	1964.15	2.17	3.33
field	2024-08-20	Himeshima Island	4.0																	32.424	22.987	7.93	530.93	516.49	514.80	1786.73	144.71	1947.04	2146.63	2.31	3.54	8	15.75	519.66	521.36	1791.11	144.06	1950.92	2.30	3.53
field	2024-08-20	Himeshima Island	5.0																	32.425	22.996	7.94	519.56	505.42	503.77	1781.06	147.00	1943.33	2146.68	2.35	3.60	8	15.33	505.88	507.54	1784.14	146.90	1946.37	2.35	3.60
field	2024-08-20	Himeshima Island	5.8																	32.425	22.988	7.94	524.00	509.75	508.08	1783.36	146.08	1944.84	2146.68	2.33	3.58	8	15.33	505.88	507.54	1784.23	146.86	1946.42	2.34	3.60
field	2024-08-20	Himeshima Island	10.0	8.710	24.192	49.966	0.000	0.000	0.000	7.087	0.171	0.000	9.874							32.426	22.968	7.96	490.39	477.06	475.50	1766.21	152.97	1933.60	2146.74	2.44	3.75	8	14.54	479.30	480.87	1770.38	152.48	1937.39	2.43	3.73
field	2024-08-20	Himeshima Island	12.0																	32.425	22.966	7.97	486.95	473.72	472.17	1764.32	153.71	1932.35	2146.68	2.45	3.76	8	14.15	466.47	468.00	1763.14	155.38	1932.67	2.48	3.81
field	2024-08-20	Himeshima Island	14.0																	32.423	22.969	7.97	482.02	468.92	467.39	1761.50	154.80	1930.47	2146.58	2.47	3.79	8	14.15	466.46	467.99	1763.04	155.38	1932.56	2.48	3.81
field	2024-08-20	Himeshima Island	16.0																	32.424	22.966	7.97	479.39	466.37	464.85	1760.10	155.38	1929.58	2146.63	2.48	3.80	8	14.15	466.46	467.99	1763.11	155.37	1932.63	2.48	3.80
field	2024-08-20	Himeshima Island	18.0																	32.424	22.969	7.98	473.81	460.93	459.43	1756.90	156.66	1927.49	2146.63	2.50	3.84	8	13.77	453.95	455.44	1755.75	158.34	1927.86	2.53	3.88
field	2024-08-20	Himeshima Island	20.0																	32.420	22.971	7.98	472.30	459.46	457.96	1755.89	156.98	1926.76	2146.43	2.51	3.84	8	13.77	453.92	455.41	1755.59	158.33	1927.68	2.53	3.88
field	2024-08-20	Himeshima Island	22.0																	32.422	22.975	7.98	469.73	456.97	455.47	1754.43	157.61	1925.85	2146.53	2.52	3.86	8	13.76	453.94	455.43	1755.61	158.36	1927.73	2.53	3.88
field	2024-08-20	Himeshima Island	24.0																	32.424	22.964	7.98	467.54	454.84	453.35	1753.35	158.09	1925.18	2146.63	2.52	3.87	8	13.77	453.95	455.44	1755.81	158.32	1927.89	2.53	3.88
field	2024-08-20	Himeshima Island	26.0																	32.422	22.970	7.98	462.79	450.21	448.74	1750.43	159.21	1923.25	2146.53	2.54	3.90	8	13.77	453.94	455.43	1755.67	158.33	1927.77	2.53	3.88
field	2024-08-20	Himeshima Island	28.0																	32.420	22.973	7.98	462.05	449.49	448.02	1749.90	159.39	1922.87	2146.43	2.54	3.90	8	13.76	453.92	455.41	1755.57	158.34	1927.67	2.53	3.88
field	2024-08-20	Himeshima Island	30.0	11.573	30.784	28.291	0.102	14.727	0.442	6.943	0.265	0.000	6.871							32.417	22.977	7.98	461.67	449.12	447.65	1749.53	159.47	1922.58	2146.28	2.55	3.90	8	13.76	453.90	455.39	1755.42	158.33	1927.52	2.53	3.88
field	2024-08-20	Himeshima Island	32.0																	32.420	22.965	7.98	462.04	449.49	448.02	1749.99	159.35	1922.93	2146.43	2.54	3.90	8	13.77	453.92	455.41	1755.66	158.30	1927.73	2.53	3.88
field	2024-08-20	Himeshima Island	34.0																	32.420	22.963	7.98	462.41	449.85	448.38	1750.23	159.25	1923.08	2146.43	2.54	3.90	8	13.77	453.92	455.41	1755.68	158.29	1927.74	2.53	3.88
field	2024-08-20	Himeshima Island	36.0																	32.421	22.960	7.98	463.14	450.56	449.09	1750.72	159.07	1923.42	2146.48	2.54	3.89	8	13.77	453.93	455.42	1755.75	158.28	1927.80	2.53	3.88
field	2024-08-20	Himeshima Island	38.0																	32.420	22.951	7.99	459.15	446.68	445.22	1748.43	159.97	1921.91	2146.43	2.55	3.92	8	13.40	441.72	443.17	1748.39	161.23	1923.02	2.57	3.95
field	2024-08-20	Himeshima Island	40.0																	32.421	22.943	7.99	459.43	446.96	445.50	1748.73	159.87	1922.12	2146.48	2.55	3.91	8	13.40	441.73	443.18	1748.52	161.20	1923.12	2.57	3.95
field	2024-08-20	Himeshima Island	42.0																	32.419	22.936	7.99	458.33	445.90	444.44	1748.10	160.08	1921.67	2146.38	2.55	3.92	8	13.41	441.71	443.16	1748.54	161.15	1923.09	2.57	3.95
field	2024-08-20	Himeshima Island	45.0																	32.424	22.925	7.99	456.92	444.54	443.08	1747.53	160.41	1921.39	2146.63	2.56	3.93	8	13.41	441.75	443.20	1748.83	161.13	1923.37	2.57	3.95
field	2024-08-20	Himeshima Island	48.0																	32.424	22.905	7.99	457.99	445.59	444.13	1748.41	160.05	1921.96	2146.63	2.55	3.92	8	13.42	441.75	443.21	1749.06	161.03	1923.52	2.57	3.94
field	2024-08-20	Himeshima Island	49.0																	32.428	22.895	7.99	460.90	448.43	446.96	1750.39	159.34	1923.31	2146.84	2.54	3.90	8	13.42	441.78	443.24	1749.32	161.01	1923.76	2.57	3.94
field	2024-08-20	Himeshima Island	50.0																	32.420	22.912	7.99	456.32	443.97	442.51	1747.21	160.45	1921.10	2146.43	2.56	3.93	8	13.42	441.73	443.18	1748.85	161.04	1923.31	2.57	3.94
field	2024-08-20	Himeshima Island	50.0	27.286	30.058	1.333	0.000	14.553	0.154	24.036	0.000	0.000	2.581							32.423	22.913	7.99	455.63	443.29	441.84	1746.87	160.65	1920.94	2146.58	2.56	3.93	8	13.42	441.75	443.20	1748.94	161.07	1923.42	2.57	3.94
field	2024-08-20	Himeshima Island	50.0																	32.425	22.917	7.99	455.28	442.95	441.50	1746.67	160.77	1920.85	2146.68	2.57	3.94	8	13.41	441.76	443.21	1748.96	161.10	1923.47	2.57	3.94
field	2024-08-20	Himeshima Island	51.0																	32.421	22.909	7.99	456.33	443.97	442.52	1747.28	160.44	1921.17	2146.48	2.56	3.93	8	13.42	441.73	443.18	1748.92	161.03	1923.37	2.57	3.94
field	2024-08-20	Himeshima Island	52.0																	32.417	22.914	7.99	457.74	445.34	443.88	1747.95	160.10	1921.52	2146.28	2.55	3.92	8	13.41	441.71	443.16	1748.73	161.03	1923.17	2.57	3.94
field	2024-08-20	Himeshima Island	53.0																	32.416	22.915	7.99	456.65	444.29	442.83	1747.26	160.35	1921.06	2146.22	2.56	3.93	8	13.41	441.70	443.15	1748.67	161.03	1923.11	2.57	3.94
field	2024-08-20	Himeshima Island	54.0																	32.421	22.907	7.99	455.25	442.93	441.48	1746.66	160.69	1920.76	2146.48	2.56	3.93	8	13.42	441.73	443.19	1748.94	161.02	1923.38	2.57	3.94
field	2024-08-20	Himeshima Island	55.0																	32.421	22.908	7.99	455.61	443.28	441.83	1746.86	160.61	1920.89	2146.48	2.56	3.93	8	13.42	441.73	443.18	1748.93	161.03	1923.38	2.57	3.94
field	2024-08-20	Himeshima Island	56.0																	32.420	22.908	7.99	455.60	443.27	441.82	1746.83	160.61	1920.85	2146.43	2.56	3.93	8	13.42	441.73	443.18	1748.90	161.02	1923.34	2.57	3.94
field	2024-08-20	Himeshima Island	57.0																	32.424	22.901	7.99	454.47	442.17	440.73	1746.35	160.88	1920.62	2146.63	2.57	3.94	8	13.42	441.76	443.21	1749.11	161.01	1923.55	2.57	3.94
field	2024-08-20	Himeshima Island	58.0																	32.426	22.899	7.99	454.48	442.19	440.74	1746.44	160.88	1920.71	2146.74	2.57	3.94	8	13.42	441.77	443.22	1749.21	161.02	1923.65	2.57	3.94
field	2024-08-20	Himeshima Island	59.0																	32.416	22.908	7.99	457.64	445.26	443.80	1747.93	160.08	1921.49	2146.22	2.55	3.92	8	13.42	441.70	443.15	1748.76	160.99	1923.17	2.57	3.94
field	2024-08-20	Himeshima Island	60.0																	32.422	22.897	7.99	454.46	442.16	440.71	1746.33	160.85	1920.56	2146.53	2.57	3.94	8	13.42	441.74	443.19	1749.09	160.98	1923.49	2.57	3.94
field	2024-08-20	Himeshima Island	62.0																	32.422	22.897	7.99	455.89	443.55	442.10	1747.19	160.50	1921.12	2146.53	2.56	3.93	8	13.42	441.74	443.19	1749.09	160.98	1923.49	2.57	3.94
field	2024-08-20	Himeshima Island	63.0																	32.421	22.896	7.99	453.74	441.46	440.02	1745.87	161.01	1920.25	2146.48	2.57	3.94	8	13.42	441.74	443.19	1749.07	160.97	1923.46	2.57	3.94
field	2024-08-20	Himeshima Island	64.0																	32.423	22.897	7.99	454.11	441.82	440.38	1746.14	160.94	1920.46	2146.58	2.57	3.94	8	13.42	441.75	443.20	1749.13	160.99	1923.53	2.57	3.94
field	2024-08-20	Himeshima Island	65.0																	32.423	22.897	7.99	452.68	440.43	438.99	1745.28	161.29	1919.90	2146.58	2.57	3.95	8	13.42	441.75	443.20	1749.13	160.99	1923.53	2.57	3.94
field	2024-08-20	Himeshima Island	66.0																	32.424	22.894	7.99	453.04	440.79	439.35	1745.56	161.19	1920.11	2146.63	2.57	3.95	8	13.42	441.76	443.21	1749.19	160.98	1923.60	2.57	3.94
field	2024-08-20	Himeshima Island	67.0																	32.423	22.895	7.99	455.53	443.21	441.76	1747.03	160.58	1921.04	2146.58	2.56	3.93	8	13.42	441.75	443.20	1749.15	160.98	1923.55	2.57	3.94
field	2024-08-20	Himeshima Island	68.0																	32.424	22.892	7.99	454.11	441.83	440.38	1746.24	160.92	1920.54	2146.63	2.57	3.94	8	13.42	441.76	443.21	1749.22	160.97	1923.61	2.57	3.94
field	2024-08-20	Himeshima Island	69.0																	32.424	22.890	7.99	454.47	442.18	440.73	1746.48	160.83	1920.70	2146.63	2.57	3.94	8	13.42	441.76	443.21	1749.24	160.96	1923.63	2.57	3.94
field	2024-08-20	Himeshima Island	70.0																	32.424	22.884	7.99	454.11	441.83	440.39	1746.33	160.88	1920.60	2146.63	2.57	3.94	8	13.43	441.76	443.21	1749.31	160.93	1923.67	2.57	3.94
field	2024-08-20	Himeshima Island	71.0																	32.428	22.885	7.99	454.85	442.55	441.10	1746.89	160.74	1921.04	2146.84	2.56	3.93	8	13.43	441.79	443.24	1749.44	160.96	1923.83	2.57	3.94
field	2024-08-20	Himeshima Island	76.0																	32.427	22.881	7.99	455.79	443.47	442.02	1747.47	160.49	1921.40	2146.79	2.56	3.93	8	13.43	441.78	443.23	1749.45	160.94	1923.82	2.57	3.94
field	2024-08-20	Himeshima Island	77.0																	32.430	22.873	7.99	455.81	443.49	442.04	1747.67	160.47	1921.58	2146.94	2.56	3.93	8	13.43	441.80	443.26	1749.65	160.92	1924.00	2.57	3.94
field	2024-08-20	Himeshima Island	78.0																	32.437	22.862	7.99	455.85	443.54	442.09	1748.04	160.46	1921.94	2147.30	2.56	3.93	8	13.44	441.85	443.31	1750.02	160.91	1924.37	2.57	3.94
field	2024-08-20	Himeshima Island	79.0																	32.433	22.854	7.99	454.75	442.48	441.03	1747.35	160.66	1921.42	2147.09	2.56	3.93	8	13.44	441.83	443.28	1749.97	160.85	1924.26	2.57	3.94
field	2024-08-20	Himeshima Island	80.0																	32.429	22.853	7.99	454.72	442.45	441.00	1747.22	160.62	1921.26	2146.89	2.56	3.93	8	13.44	441.80	443.25	1749.85	160.81	1924.10	2.57	3.94
field	2024-08-20	Himeshima Island	80.6																	32.432	22.856	7.99	456.53	444.21	442.76	1748.37	160.23	1922.06	2147.04	2.56	3.92	8	13.44	441.82	443.27	1749.91	160.85	1924.20	2.57	3.94
field	2024-08-20	Himeshima Island	82.0																	32.425	22.857	7.99	456.84	444.51	443.06	1748.33	160.10	1921.91	2146.68	2.55	3.92	8	13.44	441.77	443.22	1749.66	160.81	1923.90	2.57	3.94
field	2024-08-20	Himeshima Island	84.0																	32.426	22.846	7.99	457.20	444.87	443.41	1748.71	159.96	1922.17	2146.74	2.55	3.92	8	13.44	441.78	443.24	1749.83	160.76	1924.03	2.56	3.94
field	2024-08-20	Himeshima Island	85.0																	32.428	22.846	7.99	457.21	444.88	443.43	1748.78	159.98	1922.25	2146.84	2.55	3.92	8	13.44	441.80	443.25	1749.90	160.77	1924.11	2.56	3.94
field	2024-08-20	Himeshima Island	86.0																	32.431	22.839	7.99	457.15	444.82	443.37	1748.91	159.99	1922.39	2146.99	2.55	3.92	8	13.44	441.82	443.27	1750.08	160.76	1924.28	2.56	3.94
field	2024-08-20	Himeshima Island	88.0																	32.427	22.834	7.99	457.56	445.23	443.77	1749.10	159.83	1922.43	2146.79	2.55	3.91	8	13.45	441.79	443.25	1750.01	160.71	1924.16	2.56	3.93
field	2024-08-20	Himeshima Island	90.0																	32.427	22.837	7.99	457.12	444.80	443.34	1748.80	159.95	1922.24	2146.79	2.55	3.92	8	13.44	441.79	443.24	1749.97	160.72	1924.14	2.56	3.93
field	2024-08-20	Himeshima Island	91.0																	32.426	22.841	7.99	458.19	445.84	444.38	1749.37	159.70	1922.59	2146.74	2.55	3.91	8	13.44	441.78	443.24	1749.89	160.74	1924.07	2.56	3.94
field	2024-08-20	Himeshima Island	92.0																	32.440	22.827	7.99	457.21	444.89	443.43	1749.36	159.99	1922.85	2147.45	2.55	3.92	8	13.45	441.88	443.33	1750.53	160.76	1924.74	2.56	3.94
field	2024-08-20	Himeshima Island	93.0																	32.430	22.820	7.99	457.13	444.82	443.37	1749.10	159.89	1922.49	2146.94	2.55	3.91	8	13.45	441.82	443.27	1750.27	160.66	1924.38	2.56	3.93
field	2024-08-20	Himeshima Island	95.0																	32.428	22.821	7.99	458.92	446.56	445.10	1750.10	159.45	1923.10	2146.84	2.54	3.90	8	13.45	441.80	443.26	1750.19	160.65	1924.29	2.56	3.93
field	2024-08-20	Himeshima Island	97.0																	32.429	22.812	7.99	458.92	446.57	445.10	1750.24	159.41	1923.20	2146.89	2.54	3.90	8	13.45	441.81	443.26	1750.33	160.61	1924.40	2.56	3.93
field	2024-08-20	Himeshima Island	100.0																	32.434	22.779	7.98	463.28	450.83	449.36	1753.36	158.26	1925.31	2147.14	2.52	3.87	8	13.84	454.06	455.55	1758.29	157.50	1929.62	2.51	3.86
field	2024-08-20	Himeshima Island	100.0																	32.434	22.780	7.98	462.92	450.48	449.00	1753.14	158.35	1925.17	2147.14	2.52	3.88	8	13.84	454.06	455.55	1758.27	157.50	1929.61	2.51	3.86
field	2024-08-20	Himeshima Island	100.0																	32.432	22.784	7.98	461.82	449.41	447.93	1752.38	158.61	1924.64	2147.04	2.53	3.88	8	13.84	454.04	455.53	1758.16	157.51	1929.51	2.51	3.86
field	2024-08-20	Himeshima Island	100.0	41.959	6.200	20.838	1.051	23.401	2.030	1.471	3.049	0.000	0.000							32.435	22.780	7.98	462.56	450.13	448.66	1752.96	158.44	1925.07	2147.20	2.53	3.88	8	13.84	454.06	455.56	1758.32	157.51	1929.66	2.51	3.86
field	2024-08-20	Himeshima Island	100.0																	32.435	22.782	7.99	461.11	448.72	447.25	1752.08	158.79	1924.50	2147.20	2.53	3.89	8	13.47	441.86	443.31	1750.89	160.51	1924.86	2.56	3.93
field	2024-08-20	Himeshima Island	100.0																	32.433	22.790	7.99	460.02	447.65	446.19	1751.28	159.07	1923.94	2147.09	2.54	3.89	8	13.46	441.84	443.30	1750.72	160.54	1924.72	2.56	3.93
field	2024-08-20	Himeshima Island	100.0																	32.434	22.777	7.98	462.19	449.77	448.30	1752.75	158.50	1924.91	2147.14	2.53	3.88	8	13.84	454.06	455.55	1758.31	157.49	1929.64	2.51	3.86
field	2024-12-01	Showa Iwojima Island_Control				0.556	24.456						57.209	15.145	2.518	0.116	0	0	0.000	34.400	22.000	8.00	457.74	446.03	444.55	1824.05	174.15	2011.89	2256.85	2.74	4.19	8	13.71	445.21	446.69	1826.75	174.41	2014.87	2.74	4.20
field	2024-12-02	Showa Iwojima Island_Transition				0.000	12.873						60.883	0.000	25.261	0.000	0	0	0.982	34.400	22.300	7.90	600.34	584.69	582.76	1895.85	145.39	2059.04	2256.85	2.29	3.50	8	17.82	583.48	585.41	1898.17	145.57	2061.57	2.29	3.51
field	2024-12-02	Showa Iwojima Island_Seep				5.399	0.331						93.872	0.000	0.397	0.000	0	0	0.000	35.000	23.100	6.30	29590.31	28781.02	28687.06	2336.88	4.70	3196.82	2347.95	0.07	0.11	8	855.38	28691.87	28788.88	2337.27	4.70	3197.36	0.07	0.11