@article {RN103,
	title = {Global Perspectives on Observing Ocean Boundary Current Systems},
	journal = {Frontiers in Marine Science},
	volume = {6},
	year = {2019},
	pages = {423},
	type = {Journal Article},
	abstract = {Ocean boundary current systems are key components of the climate system, are home to highly productive ecosystems, and have numerous societal impacts. Establishment of a global network of boundary current observing systems is a critical part of ongoing development of the Global Ocean Observing System. The characteristics of boundary current systems are reviewed, focusing on scientific and societal motivations for sustained observing. Techniques currently used to observe boundary current systems are reviewed, followed by a census of the current state of boundary current observing systems globally. The next steps in the development of boundary current observing systems are considered, leading to several specific recommendations.},
	keywords = {autonomous underwater gliders, drifters, eastern boundary current systems, moorings, ocean observing systems, remote sensing, time series, western boundary current systems},
	issn = {2296-7745},
	doi = {10.3389/fmars.2019.00423},
	url = {https://www.frontiersin.org/article/10.3389/fmars.2019.00423},
	author = {Todd, Robert E. and Chavez, Francisco P. and Clayton, Sophie and Cravatte, Sophie and Goes, Marlos and Graco, Michelle and Lin, Xiaopei and Sprintall, Janet and Zilberman, Nathalie V. and Archer, Matthew and Ar{\'\i}stegui, Javier and Balmaseda, Magdalena and Bane, John M. and Baringer, Molly O. and Barth, John A. and Beal, Lisa M. and Brandt, Peter and Calil, Paulo H. R. and Campos, Edmo and Centurioni, Luca R. and Chidichimo, Maria Paz and Cirano, Mauro and Cronin, Meghan F. and Curchitser, Enrique N. and Davis, Russ E. and Dengler, Marcus and deYoung, Brad and Dong, Shenfu and Escribano, Ruben and Fassbender, Andrea J. and Fawcett, Sarah E. and Feng, Ming and Goni, Gustavo J. and Gray, Alison R. and Guti{\'e}rrez, Dimitri and Hebert, Dave and Hummels, Rebecca and Ito, Shin-ichi and Krug, Marjorlaine and Lacan, Fran{\c c}ois and Laurindo, Lucas and Lazar, Alban and Lee, Craig M. and Lengaigne, Matthieu and Levine, Naomi M. and Middleton, John and Montes, Ivonne and Muglia, Mike and Nagai, Takeyoshi and Palevsky, Hilary I. and Palter, Jaime B. and Phillips, Helen E. and Piola, Alberto and Plueddemann, Albert J. and Qiu, Bo and Rodrigues, Regina R. and Roughan, Moninya and Rudnick, Daniel L. and Rykaczewski, Ryan R. and Saraceno, Martin and Seim, Harvey and Gupta, Alex Sen and Shannon, Lynne and Sloyan, Bernadette M. and Sutton, Adrienne J. and Thompson, LuAnne and Plas, Anja K. van der and Volkov, Denis and Wilkin, John and Zhang, Dongxiao and Zhang, Linlin}
}
@article {RN108,
	title = {Integrated Observations of Global Surface Winds, Currents, and Waves: Requirements and Challenges for the Next Decade},
	journal = {Frontiers in Marine Science},
	volume = {6},
	year = {2019},
	pages = {425},
	type = {Journal Article},
	abstract = {Ocean surface winds, currents, and waves play a crucial role in exchanges of momentum, energy, heat, freshwater, gases, and other tracers between the ocean, atmosphere, and ice. Despite surface waves being strongly coupled to the upper ocean circulation and the overlying atmosphere, efforts to improve ocean, atmospheric, and wave observations and models have evolved somewhat independently. From an observational point of view, community efforts to bridge this gap have led to proposals for satellite Doppler oceanography mission concepts, which could provide unprecedented measurements of absolute surface velocity and directional wave spectrum at global scales. This paper reviews the present state of observations of surface winds, currents, and waves, and it outlines observational gaps that limit our current understanding of coupled processes that happen at the air-sea-ice interface. A significant challenge for the coming decade of wind, current, and wave observations will come in combining and interpreting measurements from (a) wave-buoys and high-frequency radars in coastal regions, (b) surface drifters and wave-enabled drifters in the open-ocean, marginal ice zones, and wave-current interaction {\textquotedblleft}hot-spots,{\textquotedblright} and (c) simultaneous measurements of absolute surface currents, ocean surface wind vector, and directional wave spectrum from Doppler satellite sensors.},
	keywords = {absolute surface velocity, air-sea interactions, Doppler oceanography from space, ocean surface winds, surface waves},
	issn = {2296-7745},
	doi = {10.3389/fmars.2019.00425},
	url = {https://www.frontiersin.org/article/10.3389/fmars.2019.00425},
	author = {Villas B{\^o}as, Ana B. and Ardhuin, Fabrice and Ayet, Alex and Bourassa, Mark A. and Brandt, Peter and Chapron, Betrand and Cornuelle, Bruce D. and Farrar, J. T. and Fewings, Melanie R. and Fox-Kemper, Baylor and Gille, Sarah T. and Gommenginger, Christine and Heimbach, Patrick and Hell, Momme C. and Li, Qing and Mazloff, Matthew R. and Merrifield, Sophia T. and Mouche, Alexis and Rio, Marie H. and Rodriguez, Ernesto and Shutler, Jamie D. and Subramanian, Aneesh C. and Terrill, Eric J. and Tsamados, Michel and Ubelmann, Clement and van Sebille, Erik}
}
