John P. Ryan

9.3k citations

153 papers · 6.6k · 1 hit paper · h-index 45

Impact in

Oceanography top 0.2%
- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
Ecology top 0.5%
- Microbial Community Ecology and Physiology
- Marine animal studies overview
- Coral and Marine Ecosystems Studies

Papers in

Oceanography 114
- Marine and coastal ecosystems 74
- Oceanographic and Atmospheric Processes 31
- Marine Biology and Ecology Research 29
- Underwater Acoustics Research 24
Ecology 62
- Marine animal studies overview 31
- Microbial Community Ecology and Physiology 16

Co-authors: Francisco P. Chávez (26 shared papers)Salvador E. Lluch‐Cota (1 shared paper)Raphael M. Kudela (20 shared papers)Yanwu Zhang (35 shared papers)James G. Bellingham (22 shared papers)Christopher A. Scholin (19 shared papers)Roman Marin (12 shared papers)James A. Yoder (5 shared papers)
Journals: Geophysical Research Letters (7 papers)The Journal of the Acoustical Society of America (7 papers)Journal of Geophysical Research Atmospheres (7 papers)Continental Shelf Research (7 papers)Frontiers in Marine Science (6 papers)
Partner nations: United States Australia Germany

In The Last Decade

John P. Ryan

146 papers receiving 6.2k citations

John P. Ryan's Hit Papers

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From Anchovies to Sardines and Back: Multidecadal Change in the Pacific Ocean 2003 · 1.4k citations

Peers

Countries citing papers authored by John P. Ryan

Since Specialization

Citations

This map shows the geographic impact of John P. Ryan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by John P. Ryan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John P. Ryan more than expected).

Fields of papers citing papers by John P. Ryan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John P. Ryan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by John P. Ryan. The network helps show where John P. Ryan may publish in the future.

Co-authors

The 25 scholars most cited alongside John P. Ryan, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with John P. Ryan Line = papers co-authored together John P. Ryan links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 153 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	From Anchovies to Sardines and Back: Multidecadal Change in the Pacific Ocean Science ·Francisco P. Chávez, John P. Ryan, Salvador E. Lluch‐Cota, Miguel Ñiquen C. Hit paper breakdown →	2003	1380
2	Coastal zone color scanner pigment concentrations in the Southern Ocean and relationships to geophysical surface features Journal of Geophysical Research Atmospheres ·Josefino C. Comiso, Charles R. McClain, C. W. Sullivan, John P. Ryan, Carrie L. Leonard	1993	256
3	Biological and chemical consequences of the 1997–1998 El Niño in central California waters Progress In Oceanography ·Francisco P. Chávez, J. Timothy Pennington, Carmen G. Castro, John P. Ryan, Reiko Michisaki, Brian Schlining, P. M. Walz, Kurt R. Buck, A McFadyen, Curtis A. Collins	2002	228
4	Pattern and synchrony of gene expression among sympatric marine microbial populations Proceedings of the National Academy of Sciences ·Elizabeth A. Ottesen, Curtis R. Young, John M. Eppley, John P. Ryan, Francisco P. Chávez, Christopher A. Scholin, Edward F. DeLong	2013	162
5	Mass Stranding of Marine Birds Caused by a Surfactant-Producing Red Tide PLoS ONE ·David A. Jessup, Melissa A. Miller, John P. Ryan, Hannah Nevins, Heather Kerkering, Abdou Mekebri, David Crane, Tyler A. Johnson, Raphael M. Kudela	2009	147
6	Causality of an extreme harmful algal bloom in Monterey Bay, California, during the 2014–2016 northeast Pacific warm anomaly Geophysical Research Letters ·John P. Ryan, Raphael M. Kudela, James M. Birch, Marguerite Blum, Holly A. Bowers, Francisco P. Chávez, Gregory J. Doucette, Kendra Hayashi, Roman Marin, Christina M. Mikulski, J. Timothy Pennington, Christopher A. Scholin, G. Jason Smith, April L Woods, Yanwu Zhang	2017	130
7	Red and black tides: Quantitative analysis of water‐leaving radiance and perceived color for phytoplankton, colored dissolved organic matter, and suspended sediments Limnology and Oceanography ·Heidi M. Dierssen, Raphael M. Kudela, John P. Ryan, Richard C. Zimmerman	2006	130
8	Linking the physiology and ecology of Cochlodinium to better understand harmful algal bloom events: A comparative approach Harmful Algae ·Raphael M. Kudela, John P. Ryan, Melissa D. Blakely, Jenny Q. Lane, Tawnya D. Peterson	2007	120
9	Metatranscriptomic analysis of autonomously collected and preserved marine bacterioplankton The ISME Journal ·Elizabeth A. Ottesen, Roman Marin, Christina M. Preston, Curtis R. Young, John P. Ryan, Christopher A. Scholin, Edward F. DeLong	2011	117
10	Influences of upwelling and downwelling winds on red tide bloom dynamics in Monterey Bay, California Continental Shelf Research ·John P. Ryan, Andrew M. Fischer, Raphael M. Kudela, J.F.R. Gower, Stephanie King, Roman Marin, Francisco P. Chávez	2008	113
11	In situ Autonomous Acquisition and Preservation of Marine Environmental DNA Using an Autonomous Underwater Vehicle Frontiers in Marine Science ·Kevan M. Yamahara, Christina M. Preston, James M. Birch, Kristine Walz, Roman Marin, Scott Jensen, Douglas Pargett, Brent Roman, William Ussler, Yanwu Zhang, John P. Ryan, Brett Hobson, Brian Kieft, Ben Y. Raanan, Kelly D. Goodwin, Francisco P. Chávez, Christopher A. Scholin	2019	111
12	Interacting physical, chemical and biological forcing of phytoplankton thin-layer variability in Monterey Bay, California Continental Shelf Research ·John P. Ryan, Margaret A. McManus, James M. Sullivan	2009	101
13	Application of the Hyperspectral Imager for the Coastal Ocean to Phytoplankton Ecology Studies in Monterey Bay, CA, USA Remote Sensing ·John P. Ryan, Curtiss O. Davis, Nicholas Tufillaro, Raphael M. Kudela, Bo‐Cai Gao	2014	89
14	Physical-biological coupling in Monterey Bay, California: topographic influences on phytoplankton ecology Marine Ecology Progress Series ·John P. Ryan, FP Chavez, James G. Bellingham	2005	86
15	Enhanced chlorophyll at the shelfbreak of the Mid‐Atlantic Bight and Georges Bank during the spring transition Limnology and Oceanography ·John P. Ryan, James A. Yoder, Peter Cornillon	1999	81
16	Underwater Application of Quantitative PCR on an Ocean Mooring PLoS ONE ·Christina M. Preston, Adeline Harris, John P. Ryan, Brent Roman, Roman Marin, Scott Jensen, Cheri Everlove, James M. Birch, John M. Dzenitis, Douglas Pargett, Masao Adachi, Kendra A. Turk, Jonathan P. Zehr, Christopher A. Scholin	2011	80
17	A coastal ocean extreme bloom incubator Geophysical Research Letters ·John P. Ryan, J.F.R. Gower, Stephanie King, W. Paul Bissett, Andrew M. Fischer, Raphael M. Kudela, Zbigniew Kolber, Fernanda Mazzillo, Erich Rienecker, Francisco P. Chávez	2008	80
18	Phytoplankton thin layers caused by shear in frontal zones of a coastal upwelling system Marine Ecology Progress Series ·John P. Ryan, MA McManus, Jeffrey D. Paduan, FP Chavez	2008	80
19	Nutrient Loading through Submarine Groundwater Discharge and Phytoplankton Growth in Monterey Bay, CA Environmental Science & Technology ·Alanna L Lecher, Katherine R. M. Mackey, Raphael M. Kudela, John P. Ryan, A. T. Fisher, Joseph Murray, Adina Paytan	2015	78
20	Western Pacific modulation of large phytoplankton blooms in the central and eastern equatorial Pacific Journal of Geophysical Research Atmospheres ·John P. Ryan, Iwao Ueki, Yi Chao, Hongchun Zhang, Paulo S. Polito, Francisco P. Chávez	2006	77

About John P. Ryan

John P. Ryan is a scholar working on Oceanography, Ecology, Global and Planetary Change, Ocean Engineering and Environmental Chemistry, having authored 153 papers that have together received 6.6k indexed citations. Recurring topics across this work include Marine and coastal ecosystems (74 papers), Marine animal studies overview (31 papers), Oceanographic and Atmospheric Processes (31 papers), Underwater Vehicles and Communication Systems (30 papers), Marine Biology and Ecology Research (29 papers), Marine and fisheries research (26 papers), Underwater Acoustics Research (24 papers) and Microbial Community Ecology and Physiology (16 papers). The work is most often cited by research in Oceanography (3.9k citations), Ecology (2.6k citations), Global and Planetary Change (2.2k citations), Environmental Chemistry (842 citations) and Developmental Biology (107 citations). John P. Ryan has collaborated with scholars based in United States, Australia and Germany. Frequent co-authors include Francisco P. Chávez, Salvador E. Lluch‐Cota, Raphael M. Kudela, Yanwu Zhang, James G. Bellingham, Christopher A. Scholin, Roman Marin, James A. Yoder, Christina M. Preston and Paulo S. Polito. Their work appears in journals such as Geophysical Research Letters, The Journal of the Acoustical Society of America, Journal of Geophysical Research Atmospheres, Continental Shelf Research and Frontiers in Marine Science.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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John P. Ryan

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