BGQNAPv1.0: A summer macronutrients binned data set for the Northern Antarctic Peninsula, Southern Ocean
Creators
- 1. FURG
- 2. UERJ
- 3. The University of Edinburgh
Description
We compiled a time series spanning the period from 1996 to 2019 of the seawater hydrographic variables conservative temperature (oC), absolute salinity (g kg–1) and dissolved oxygen (μmol kg–1), and the macronutrients DIN (nitrate + nitrite + ammonium), phosphate, and silicic acid (μmol kg–1). The study area covered the northern Antarctic Peninsula regions including the Gerlache Strait and the western, central, and eastern basins of Bransfield Strait. Most data (~90%) were obtained from the Brazilian High Latitude Oceanography Group (GOAL; http://goal.furg.br/) from austral summer field campaigns (January-March). In some years (1996, 2005, 2006, 2010, 2011) we used hydrographic and macronutrient data from GLODAP 2020 (Olsen et al., 2020) along the NAP and exceptionally for 1996 we used data available from December 1995 to February 1996 (the FRUELA cruises, García et al., 2022; Álvarez et al., 2002). Details on the sampling and analysis of macronutrient data obtained from GLODAP dataset can be accessed on the OCADS platform (https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system-portal/).
About 97% of the DIN data were composed of nitrate, followed by ammonium (2%) and nitrite (1%). Therefore, in some cases (11% of all data), we considered DIN as the nitrate concentration, when no nitrite and/or ammonium data were available. Discrete seawater samples were collected at irregular depth intervals from surface (5 m) to deep waters (at approximately 15 m from the bottom). We averaged the parameters for each region at regular depth intervals from the surface to the bottom (i.e., 0, 25, 50, 75, 100, 250, 500, 750, 1000, 1250, 1500, 1750, 2000, 2500 m) to obtain an averaged summer profile for each year.
All sampling and analyses information of the hydrographic and macronutrients are detailed in Kerr et al. (2018), Mata et al. (2018), Dotto et al. (2021) and Costa et al. (2020), and references therein.
Notes
Files
BGQ_NAPv1.0.txt
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Additional details
References
- Kerr, R., Mata, M. M., Mendes, C. R. B. and Sechhi, E. R. (2018). Northern Antarctic Peninsula: a marine climate hotspot of rapid changes on ecosystems and ocean dynamics, Deep Sea Research Part II, 149, 4–9, doi: 10.1016/j.dsr2.2018.05.006.
- Mata, M. M., Tavano, V. M. and Garcia, C. A. E. (2018). 15 years sailing with the Brazilian High Latitude Oceanography Group (GOAL), Deep Sea Research Part II, 149, 1-3, doi: 10.1016/j.dsr2.2018.05.007.
- Dotto, T. S., Mata, M. M., Kerr, R., and Garcia, C. A. E. (2021). A novel hydrographic gridded data set for the northern Antarctic Peninsula, Earth Syst. Sci. Data, 13, 671–696, https://doi.org/10.5194/essd-13-671-2021
- Álvarez, M., Ríos, A. F. & Rosón, G. Spatio-temporal variability of air–sea fluxes of carbon dioxide and oxygen in the Bransfield and Gerlache Straits during. Dee. Res. 49, 643–662 (2002).
- García, M. A. et al. Water masses and distribution of physico-chemical properties in the Western Bransfield Strait and Gerlache Strait during Austral summer 1995/96. Deep Sea Res. Part II Top. Stud. Oceanogr. 49, 585–602 (2002).
- Costa, R. R. et al. Dynamics of an intense diatom bloom in the Northern Antarctic Peninsula, February 2016. Limnol. Oceanogr. 66, 1–20 (2020).
- Olsen, A., Lange, N., Key, R. M., Tanhua, T., Bittig, H. C., Kozyr, A., et al. (2020). An updated version of the global interior ocean biogeochem- ical data product, GLODAPv2.2020. Earth System Science Data, 12(4), 3653–3678. https://doi.org/10.5194/essd-12-3653-2020