The concentration of suspended particulate matter, SPM, defined as dry mass of particles per unit volume of water, was estimated using the standard gravimetric technique. We used pre-rinsed, pre-combusted, pre-weighed GF/F filters (25 mm in diameter) for filtration of measured volumes of seawater. Samples were rinsed three times with DI, followed by a separate rinse of filter edges after removal of filter cup, to remove sea salt. The dry mass of SPM collected on filters was measured with a Mettler-Toledo MT5 microbalance (resolution 0.001 mg). 1-3 replicate filters were measured for each sample. The SPM data are included in the data file with POC and PON.
Upon consultation in advance with the chief of investigation and the person(s) in charge of research issues who gathered that data, we request that the text of the results material contain a statement to the effect that it was obtained during the R/V Mirai cruise of MR17-05C, the Chief Scientist, Shigeto Nishino (JAMSTEC), and the following Principal Investigators (PIs) for gathering the data.
Chief Scientist Shigeto Nishino Japan Agency for Marine - Earth Science and Technology (JAMSTEC) 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan Tel: +81-46-867-9487, Fax: +81-46-867-9437 E-mail: firstname.lastname@example.org
PI Toru Hirawake (Hokkaido Unviersity)
Please also mention that this cruise was supported by the Arctic Challenge for Sustainability (ArCS) Project, which was funded by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT), and the Global Change Observation Mission-Climate (GCOM-C) mission of Japan Aerospace Exploration Agency (JAXA).
Mettler-Toledo MT5 microbalance
Station times and locations are given in the file "SIO_StationLog_MR17-05C.txt".