{"id":22,"date":"2012-09-05T11:22:33","date_gmt":"2012-09-05T15:22:33","guid":{"rendered":"https:\/\/people.clas.ufl.edu\/template\/?page_id=22"},"modified":"2026-03-19T08:26:04","modified_gmt":"2026-03-19T12:26:04","slug":"research-2","status":"publish","type":"page","link":"https:\/\/people.clas.ufl.edu\/jbmartin\/research-2\/","title":{"rendered":"Research Interests"},"content":{"rendered":"\r\n
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Research Interests<\/h1>\n\n\n\n

My research falls into three major categories listed below.\u00a0 Although these topics appear to be unrelated, they are all linked in their focus on fluxes of water, solutes, and isotopes caused by biogeochemical reactions coupled with flow. In many cases these processes relate to interactions of surface water and groundwater.\u00a0 Bibliographies of some recent papers in each topic are provided by links in the titles.<\/p>\n\n\n\n

\"stream_guaging\"
<a href=”https:\/\/people.clas.ufl.edu\/jbmartin\/files\/stream_guaging.jpg” rel=”attachment wp-att-155″><\/a> Stream gauging at Vinzant’s landing on Santa Fe River<\/figcaption><\/figure>\n\n\n\n
Carbonate karst aquifers<\/span><\/small><\/big><\/big><\/big><\/a><\/h5>\n\n\n\n

Most of my research on karst aquifers has been on the Floridan aquifer, but I have also been working extensively in the Bahamas and lately in the Yucatan.\u00a0 My research focuses on how water flowing through conduits exchanges with water of the high-porosity matrix rocks.\u00a0 I have also been active in developing tools to measure and predict fluxes of nutrients through carbonate karst watersheds.\u00a0 I have recently been working on controls of redox conditions of carbonate aquifers from organic carbon remineralization\u00a0 and how redox conditions affect metal mobilization and greenhouse gas production and consumption.\u00a0 I currently lead a Research Coordination Network on Carbonate Critical Zones.\u00a0 See more information here<\/a>.<\/p>\n\n\n\n\n\n\n\n\n\n

\"Core2\"
<a href=”https:\/\/people.clas.ufl.edu\/jbmartin\/files\/Core2.jpg” rel=”attachment wp-att-153″><\/a> Retrieving vibracore from Indian River Lagoon seepage face<\/figcaption><\/figure>\n\n\n\n
Coastal aquifers and sea level change<\/span><\/a>
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I am interested in quantifying fluxes of water from coastal aquifers and its significance to water quality in estuarine and coastal surface water.\u00a0 This work has focused mostly on Indian River Lagoon on the east coast of Florida, but other areas include Tampa Bay, Bahamas, Barbados, Brazil, and the Yucatan.\u00a0 One particular emphasis of this work is the redox chemistry of lagoon sediment pore water and the relationships between remineralization of organic carbon and metal mobilization and greenhouse gas fluxes.\u00a0 My most recent work has been on the effects of sea level rise on these estuarine processes.<\/p>\n\n\n\n\n\n\n\n\n\n

\"drainage
<a href=”https:\/\/people.clas.ufl.edu\/jbmartin\/files\/drainage-from-greenland.jpg” rel=”attachment wp-att-154″><\/a> Drainage from the Greenland ice sheet<\/figcaption><\/figure>\n\n\n\n
Weathering following ice sheet retreat<\/span><\/small><\/big><\/big><\/big><\/a><\/h6>\n\n\n\n

Retreat of continental ice sheets has exposed about 15% of Earth’s terrestrial landscape.\u00a0 My interest in these landscapes is to assess how exposure and related weathering, plant colonization and succession, and biogeochemical reactions have altered fluxes of solutes, nutrients, and radiogenic isotopes to coastal regions and modify fluxes and consumption of greenhouse gases in Earth’s atmosphere.\u00a0 This work has focused on several watersheds in southwest and south Greenland.\u00a0 This work is being supported through a recent NSF grant; see Project Summary here<\/a>.<\/p>\n\n\n\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/section>\r\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":11,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"featured_post":"","footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-22","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/people.clas.ufl.edu\/jbmartin\/wp-json\/wp\/v2\/pages\/22","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/people.clas.ufl.edu\/jbmartin\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/people.clas.ufl.edu\/jbmartin\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/people.clas.ufl.edu\/jbmartin\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/people.clas.ufl.edu\/jbmartin\/wp-json\/wp\/v2\/comments?post=22"}],"version-history":[{"count":10,"href":"https:\/\/people.clas.ufl.edu\/jbmartin\/wp-json\/wp\/v2\/pages\/22\/revisions"}],"predecessor-version":[{"id":426,"href":"https:\/\/people.clas.ufl.edu\/jbmartin\/wp-json\/wp\/v2\/pages\/22\/revisions\/426"}],"wp:attachment":[{"href":"https:\/\/people.clas.ufl.edu\/jbmartin\/wp-json\/wp\/v2\/media?parent=22"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}