Ruifang C Xie

Ruifang C Xie
Shanghai Jiao Tong University | SJTU

PhD

About

25
Publications
8,937
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
580
Citations
Citations since 2016
13 Research Items
532 Citations
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
Additional affiliations
September 2016 - present
GEOMAR Helmholtz Centre for Ocean Research Kiel
Position
  • PostDoc Position
Description
  • Using the 234Th tracer to quantify vertical fluxes of C, N, P, and Fe in the Peruvian oxygen minimum zone.
June 2013 - September 2016
Max Planck Institute for Chemistry
Position
  • PostDoc Position
Description
  • Investigate the biogeochemical cycling of Cd stable isotopes in the modern ocean and their potential to be used as a water mass tracer in the past.
January 2013 - May 2013
Texas A&M University
Position
  • Research Assistant
Description
  • Teaching assistant for Geochemistry (GEOL 451)
Education
August 2007 - May 2013
Texas A&M University
Field of study
  • Isotope Geochemistry (Paleoclimatology & Paleoceanography)
September 2003 - July 2007
University of Science and Technology of China
Field of study
  • Environmental Science

Publications

Publications (25)
Article
We present seawater Cd isotopic compositions in five depth profiles and a continuous surface water transect, from 50°S to the Equator, in the western South Atlantic, sampled during GEOTRACES cruise 74JC057 (GA02 section, Leg 3), and investigate the mechanisms governing Cd isotope cycling in the upper and deep ocean.
Article
The correlation between dissolved cadmium (Cd) and phosphate (PO4) in the modern ocean has been extensively studied. However, factors that cause the non-linearity in this global correlation are still largely debated and poorly constrained. In this study, we present vertical and meridional distributions of Cd concentrations along the GEOTRACES GA02...
Article
Decades of paleoceanographic studies have reconstructed a well-resolved water mass structure for the deep Atlantic Ocean during the Last Glacial Maximum (LGM). However, the variability of intermediate water circulation in the tropics over the LGM and deglacial abrupt climate events is still largely debated. This study aims to reconstruct intermedia...
Article
Understanding intermediate water circulation across the last deglacial is critical in assessing the role of oceanic heat transport associated with Atlantic Meridional Overturning Circulation variability across abrupt climate events. However, the links between intermediate water circulation and abrupt climate events such as the Younger Dryas (YD) an...
Article
The provenance of eolian dust supplied to deep-sea sediments has the potential to offer insights into changes in past atmospheric circulation. Specifically, measuring temporal changes in dust provenance can shed light on changes in the mean position of the Intertropical Convergence Zone (ITCZ), a region acting as a barrier separating wind-blown mat...
Article
Full-text available
Upwelling of subsurface waters injects macronutrients (fixed N, P, and Si) and micronutrient trace metals (TMs) into surface waters supporting elevated primary production in Eastern Boundary Upwelling Regions. The eastern South Atlantic features a highly productive shelf sea transitioning to a low productivity N‐Fe (co)limited open ocean. Whilst a...
Article
Full-text available
The eastern boundary region of the southeastern Pacific Ocean hosts one of the world's most dynamic and productive upwelling systems with an associated oxygen minimum zone (OMZ). The variability in downward export fluxes in this region, with strongly varying surface productivity , upwelling intensities and water column oxygen content , is however p...
Article
Full-text available
Oxygen-deficient zones (ODZs) are major sites of net natural nitrous oxide (N2O) production and emissions. In order to understand changes in the magnitude of N2O production in response to global change, knowledge on the individual contributions of the major microbial pathways (nitrification and denitrification) to N2O production and their regulatio...
Preprint
Full-text available
The eastern boundary region of the southeast Pacific Ocean hosts one of the world's most dynamic and productive upwelling systems with an associated oxygen minimum zone (OMZ). The variability in downward export fluxes in this region, with strongly varying surface productivity, upwelling intensities and water column oxygen content, is however poorly...
Article
Full-text available
Oxygen deficient zones (ODZs) are major sites of net natural nitrous oxide (N2O) production and 15 emissions. In order to understand changes in the magnitude of N2O production in response to global change, knowledge on the individual contributions of the major microbial pathways (nitrification and denitrification) to N2O production and their regula...
Article
Over the past decades, observations have confirmed decreasing oxygen levels and shoaling of oxygen minimum zones (OMZs) in the tropical oceans. Such changes impact the biogeochemical cycling of micronutrients such as Cd, but the potential consequences are only poorly constrained. Here, we present seawater Cd concentrations and isotope compositions...
Article
We present coupled cadmium (Cd) concentrations and Cd isotopic compositions (expressed as δ¹¹⁴Cd) in seawater profiles along the northeast-southwest GEOTRACES GA11 section in the tropical Atlantic Ocean. The GA11 section encompasses three contrasting regions including the Amazon River plume, the North African dust plume, and the Guinea Dome oxygen...
Article
Full-text available
The GEOTRACES Intermediate Data Product 2017 (IDP2017) is the second publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2016. The IDP2017 includes data from the Atlantic, Pacific, Arctic, Southern and Indian oceans, with about twice the data volume of the pre...
Article
The GEOTRACES Intermediate Data Product 2017 (IDP2017) is the second publicly available data product of the international GEOTRACES programme, and contains data measured and quality controlled before the end of 2016. The IDP2017 includes data from the Atlantic, Pacific, Arctic, Southern and Indian oceans, with about twice the data volume of the pre...
Article
The Line Islands Ridge (LIR), located south of the Hawaiian Islands between 7°N and 1°S, is one of the few large central Pacific regions shallower than the regional carbonate compensation depth. Thick sequences of carbonate sediments have accumulated around the LIR despite it being located in the sediment-starved central tropical Pacific. The LIR i...
Article
Much uncertainty exists about the state of the oceanic and atmospheric circulation in the Tropical Pacific over the last glacial cycle. Studies have been hampered by the fact that sediment cores suitable for study were concentrated in the Western and Eastern parts of the Tropical Pacific, with little information from the Central Tropical Pacific. H...
Conference Paper
Full-text available
We present new seawater Cd concentration and ε112Cd/110Cd from five depth profiles in the South Atlantic along the western boundary (48.86˚S-0.18˚S, GEOTRACES JC057). The vertical distributions of [Cd] and (ε112Cd/110Cd) vary antithetically, with a decrease (increase) at depths influenced by NADW and a slight increase (decrease) reflecting northwar...
Data
The provenance of eolian dust supplied to deep-sea sediments has the potential to offer insights into changes in past atmospheric circulation. Specifically, measuring temporal changes in dust provenance can shed light on changes in the mean position of the Intertropical Convergence Zone (ITCZ), a region acting as a barrier separating wind-blown mat...
Data
Understanding intermediate water circulation across the last deglacial is critical in assessing the role of oceanic heat transport associated with Atlantic Meridional Overturning Circulation variability across abrupt climate events. However, the links between intermediate water circulation and abrupt climate events such as the Younger Dryas (YD) an...
Article
Reorganization of meridional overturning circulation that is a response to or a trigger of climate change in the North Atlantic has been a subject of intense interest. During the last deglaciation, cold periods such as the Younger Dryas (YD) and Heinrich 1 (H1) are thought to be coincident with significant reductions in North Atlantic Deep Water (N...
Article
Changing patterns of eolian dust deposition preserved in deep-sea sediments have the potential to provide us with a better understanding of changes in past atmospheric circulation. One way in which to determine the provenance of dust in deep-sea sediments is to use radiogenic isotopic tracers which can fingerprint potential dust sources. Models (e....

Questions

Question (1)
Question
Does anyone know what the best way to plot metal concentrations on a T-S plot that also shows the isopycnals is?
So far I am only able to plot conservative temperature versus absolute salinity on ODV, which automatically generates isopycnals. But the isopycnal values (reference pressure = 0 dbar) don't seem to correlate with neutral density. Any suggestions would help.
Thanks!

Network

Cited By

Projects

Project (1)
Project
Groundwater resources in coastal regions are facing enormous stress caused by population growth, increased pollution and climate change, with the recent crisis in Cape Town - a city with 4.5 million inhabitants that just escaped a total shutdown of fresh water supply - being just the latest prominent example. Offshore aquifers (OAs) - freshwater bodies located beneath the seafloor - have been proposed as an alternative source of freshwater. However, there are a number of first-order questions that need to be addressed before OAs can be exploited sustainably. These include a lack of understanding of the location, nature, geometry and architecture of OAs, their connectivity with onshore aquifers, and their evolution in response to potential exploitation and predicted climate change. Here we introduce the project SMART, which will lead to a step change in the methodology used to characterise OAs and in our understanding of how they can be used sustainably. Specifically, we will (1) Develop a best practice guide on how to combine geophysical measurements with geochemical characterisation to detect, characterise and monitor OAs, (2) Quantify the hydrologic budget of OAs, and (3) Predict how OAs will change in response to extraction and sea level rise associated to climate change. SMART will entail a unique integration of innovative concepts and techniques from terrestrial and marine geology, geochemistry, geophysics, and hydrogeology to reach the project objectives. The outcomes of the SMART project will be shared with a wide range of stakeholders via scientific publications, conference communications, website, social media, interviews and press releases, public understanding of science activities, workshops and a best-practice guide. The project will bring together five scientists from GEOMAR and two scientists from the University of Malta (UoM), in addition to four newly appointed junior researchers. This team will conduct the project and build up an international centre for offshore groundwater research. This will increase GEOMAR’s international visibility and puts groundwater research onto GEOMAR’s POFIV agenda as one of the grand challenges that is not being addressed by its present POF program. The cooperation and capacity building activities planned by GEOMAR and UoM include advanced training schools, exchange programs, mutual participation in advisory bodies, joint sessions at international conferences, and joint scientific publications. Links: https://smart.geomar.de/home https://www.geomar.de/en/news/article/suche-nach-grundwasser-im-ozean/ https://www.helmholtz.de/en/current_topics/press_releases/article/artikeldetail/first_selection_phase_for_helmholtz_european_partnering_new_impetus_for_the_european_research_area/