Jens Zinke

Jens Zinke
University of Leicester | LE · School of Geography Geology and Environment

Professor

About

119
Publications
33,457
Reads
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3,598
Citations
Introduction
My research involves the geochemical study of marine biological archives (massive corals) from the Indo-Pacific Ocean as recorders of environmental and climate change over the past 300 years and during the Holocene. For most of my career, I have worked on western Indian Ocean coral records. This work is motivated by the need to produce reliable, long-term observations of sea surface temperature, ocean currents and the hydrological cycle over the tropical/subtropical oceans.
Additional affiliations
April 2016 - present
Curtin University
Position
  • Associate Professor (Adjunct)
Description
  • Adjunct to foster collaboration with the FU Berlin and Curtin Sarawak Malaysia
May 2015 - March 2016
Curtin University
Position
  • Senior Researcher
Description
  • I was appointed Adjunct Associate Professor at Curtin to foster collaborations in marine climate change studies.
January 2015 - present
University of the Witwatersrand
Position
  • Adjunct Senior Scientist
Description
  • I am an Adjunct Senior Scientist collaborating in paleoclimatological studies with a special emphasis on the impact of the Indian and Pacific Ocean on Southern Africa.

Publications

Publications (119)
Article
Most annually resolved climate reconstructions of the Common Era are based on terrestrial data, making it a challenge to independently assess how recent climate changes have affected the oceans. Here, as part of the Past Global Changes (PAGES) Ocean2K project, we present four regionally calibrated and validated reconstructions of sea-surface temper...
Article
Full-text available
Increasing intensity of marine heatwaves has caused widespread mass coral bleaching events, threatening the integrity and functional diversity of coral reefs. Here we demonstrate the role of inter-ocean coupling in amplifying thermal stress on reefs in the poorly studied southeast Indian Ocean (SEIO), through a robust 215-year (1795–2010) geochemic...
Article
Full-text available
Episodic anomalously warm sea surface temperature (SST) extremes, or marine heatwaves (MHWs), amplify ocean warming effects and may lead to severe impacts on marine ecosystems. MHW-induced coral bleaching events have been observed frequently in recent decades in the southeast Indian Ocean (SEIO), a region traditionally regarded to have resilience t...
Article
Full-text available
The western Indian Ocean has been warming faster than any other tropical ocean during the 20th century, and is the largest contributor to the global mean sea surface temperature (SST) rise. However, the temporal pattern of Indian Ocean warming is poorly constrained and depends on the historical SST product. As all SST products are derived from the...
Article
The Agulhas Current (AC) off the southern tip of Africa is one of the strongest western boundary currents and a crucial choke point of inter-ocean heat and salt exchange between the Indian Ocean and the southern Atlantic Ocean. However, large uncertainties remain concerning the sea surface temperature (SST) and salinity (SSS) variability in the AC...
Conference Paper
The Mediterranean Sea is one of the world regions most affected by anthropogenic climate change. Developing climate archives in this sea is essential to reconstruct past environmental and ecological conditions, especially during the last decades which are characterized by a sharp increase in summer heat waves and widespread ecological impacts. We u...
Article
Internal water in cold‐water and tropical coral skeletons was extracted and measured for its oxygen and hydrogen isotope ratios. Water was extracted by crushing pieces of coral hard tissue in a percussion device connected to either a cavity‐ring down spectroscopy (CRDS) system or an isotope ratio mass spectrometry (IRMS) system. Despite most sample...
Chapter
Full-text available
Extinction, coupled with many other biological signals, is a major geological indicator of the Anthropocene. The introduction of non-native species, deforestation, depletion of fisheries and modification of coastal environments, domestication of animals, and the reconfiguration of terrestrial ecosystems are all evident in the geological record and...
Article
Full-text available
The Anthropocene was conceptualized in 2000 to reflect the extensive impact of human activities on our planet, and subsequent detailed analyses have revealed a sub- stantial Earth System response to these impacts begin- ning in the mid-20th century. Key to this understanding was the discovery of a sharp upturn in a multitude of global socio-economi...
Article
Full-text available
Small changes in Pacific temperature gradients connected with the El Niño Southern Oscillation (ENSO) influence the Walker Circulation and are related to global climate anomalies. Therefore, it is of paramount importance to develop robust indices of their past behavior. Here, we reconstruct the difference in sea surface temperature between the west...
Preprint
Full-text available
The Agulhas Current (AC) off the southern tip of Africa is one of the strongest western boundary currents and a crucial chokepoint of inter-ocean heat and salt exchange between the Indian and the South Atlantic Ocean. However, large uncertainties remain concerning the sea surface temperature and salinity variability in the AC region and their drivi...
Preprint
Full-text available
Here, we reconstruct the difference in sea surface temperature between the west and central Pacific during ENSO based on the Last Millennium Paleo Hydrodynamics Data Assimilation since 1000 AD. We demonstrate that the strength of the West Pacific Gradient (WPG) is related to stronger atmospheric circulation and remote precipitation anomalies during...
Article
Full-text available
The term Anthropocene initially emerged from the Earth System science community in the early 2000s, denoting a concept that the Holocene Epoch has terminated as a consequence of human activities. First associated with the onset of the Industrial Revolution, it was then more closely linked with the Great Acceleration in industrialization and globali...
Article
Full-text available
Extreme climate events, such as the El Niños in 1997/1998 and 2015/16, have led to considerable forest loss in the Southeast Asian region following unprecedented drought and wildfires. In Borneo, the effects of extreme climate events have been exacerbated by rapid urbanization, accelerated deforestation and soil erosion since the 1980s. However, st...
Article
Full-text available
Sea surface salinity (SSS) is an important variable in the global ocean circulation. However, decadal to interdecadal changes in SSS are not well understood due to the lack of instrumental data. Here we reconstruct SSS from a paired, bimonthly resolved coral δ¹⁸O and Sr/Ca record from La Reunion Island that extends from 1913 to 1995. Coral Sr/Ca co...
Presentation
Full-text available
1.3.-2 Palaeoclimate reconstruction using aquatic high-resolution archives 26 between 3°C and 10°C. We suggest that this is not only related to occurring vital effect during elemental incorporation of the corals, but also due to oceanographic changes. Reconstructed temperatures and Ba/ Ca ratios show an 11-year variability. We suggest that this var...
Poster
Full-text available
Palaeoclimate reconstructions are crucial to understand the climatic and oceanic system. Coral geochemical proxy archives provide excellent high-resolution reconstructions of several climatic and hydrological parameters. Here, we investigate subfossil (~6200-7100 years old) Siderastrea sp. and Pseudodiploria sp. corals from a pristine Mid-Holocene...
Article
Full-text available
For reefs in South East Asia the synergistic effects of rapid land development, insufficient environmental policies and a lack of enforcement has led to poor water quality and compromised coral health from increased sediment and pollution. Those inshore turbid coral reefs, subject to significant sediment inputs, may also inherit some resilience to...
Conference Paper
Full-text available
Despite shallow coral reefs are mainly restricted to tropical and subtropical marine environments, relict reef-builder corals can be also found in temperate seas like the Mediterranean Sea. The aim of this presentation is to show the preliminary results of an ongoing interdisciplinary project studying the Mediterranean endemic coral Cladocora caesp...
Article
Full-text available
Here we report seasonally resolved sea surface temperatures for the southern Mozambique Channel in the SW Indian Ocean based on multi-trace-element temperature proxy records preserved in two Porites sp. coral cores. Particularly, we assess the suitability of both separate and combined Sr∕Ca and Li∕Mg proxies for improved multielement SST reconstruc...
Preprint
Full-text available
For reefs in SE Asia the synergistic effects of rapid land-development, insufficient environmental policies and a lack of enforcement has led to poor water quality and compromised coral health from increased sediment and pollution. Those inshore turbid coral reefs, subject to significant sediment inputs, may also inherit some resilience to the effe...
Preprint
For reefs in SE Asia the synergistic effects of rapid land-development, insufficient environmental policies and a lack of enforcement has led to poor water quality and compromised coral health from increased sediment and pollution. Those inshore turbid coral reefs, subject to significant sediment inputs, may also inherit some resilience to the effe...
Article
Full-text available
Here we report seasonally resolved sea surface temperatures for the southern Mozambique Channel in the SW Indian Ocean based on multi-trace element temperatures proxy records preserved in two Porites sp. coral cores. Particularly, we assess the suitability of both separate and combined Sr/Ca and Li/Mg proxies for improved multi-element SST reconstr...
Poster
Full-text available
We reconstruct the spatio-temporal dynamics of sea surface temperature, light availability and oxygen isotopic composition of seawater based on paired stable isotope (oxygen, carbon) and Sr/Ca measurements on coral cores obtained from three sites within the Miri-Sibuti Coral Reef National Park, Borneo, Malaysia. Our results reveal distinct seasonal...
Article
Full-text available
Tropical Coral Archives—Reconstructions of Climate and Environment Beyond the Instrumental Record at Society-Relevant Timescales; Bremen, Germany, 28 September 2017
Article
Full-text available
To describe, model and assess the relative importance of environmental and climatic factors likely influencing the regional distribution of coral cover and assemblages with contrasting life histories and susceptibilities to bleaching.
Article
Full-text available
The only low latitude pathway of heat and salt from the Pacific Ocean to the Indian Ocean, known as Indonesian Throughflow (ITF), has been suggested to modulate Global Mean Surface Temperature (GMST) warming through redistribution of surface Pacific Ocean heat. ITF observations are only available since ~1990s and thus its multi-decadal variability...
Article
Full-text available
Reproducible climate reconstructions of the Common Era (1 CE to present) are key to placing industrial-era warming into the context of natural climatic variability. Here we present a community-sourced database of temperature-sensitive proxy records from the PAGES2k initiative. The database gathers 692 records from 648 locations, including all conti...
Article
Full-text available
The climate of Southern Africa, defined as the land area bound by the region 15°S–35°S; 12.5°E–42.5°E, during the December–March rainy season is driven by Indo-Pacific sea surface temperature (SST) anomalies associated with the El Niño Southern Oscillation (ENSO) and the Subtropical Indian Ocean Dipole (SIOD). The observed December–March 1979–2014...
Article
Full-text available
During the summer of 2010/11, a regional marine heat wave resulted in coral bleaching of variable severity along much of the western coastline of Australia. At Ningaloo Reef, a 300km long fringing reef system and World Heritage site, highly contrasting coral bleaching was observed between two morphologically distinct nearshore reef communities loca...
Article
The western Indian Ocean has been warming rapidly over the past decades and this has adversely impacted the Asian Monsoon circulation. It is therefore of paramount importance to improve our understanding of links between Indian Ocean Sea Surface Temperature (SST) variability, climate change, and sustainability of reef ecosystems. Here we present tw...
Article
Full-text available
The western Indian Ocean has been warming rapidly over recent decades, causing a greater number of extreme climatic events. It is therefore of paramount importance to improve our understanding of links between Indian Ocean sea surface temperature (SST) variability, climate change and sustainability of tropical coral reef ecosystems. Here we present...
Article
Full-text available
Coral reefs are biologically diverse ecosystems threatened with effective collapse under rapid climate change, in particular by recent increases in ocean temperatures. Coral bleaching has occurred during major El Niño warming events, at times leading to the die-off of entire coral reefs. Here we present records of stable isotopic composition, Sr/Ca...
Article
The evolution of industrial-era warming across the continents and oceans provides a context for future climate change and is important for determining climate sensitivity and the processes that control regional warming. Here we use posted 1500 palaeoclimate records to show that sustained industrial-era warming of the tropical oceans first developed...
Article
The evolution of industrial-era warming across the continents and oceans provides a context for future climate change and is important for determining climate sensitivity and the processes that control regional warming. Here we use post 1500 palaeoclimate records to show that sustained industrial-era warming of the tropical oceans first developed...
Article
The effects of climate change are difficult to predict for many marine species because little is known of their response to climate variations in the past. However, long-term chronologies of growth, a variable that integrates multiple physical and biological factors, are now available for several marine taxa. These allow us to search for climate-dr...
Article
Full-text available
The western Indian Ocean has been warming rapidly over the past decades and this has adversely impacted the Asian Monsoon circulation. It is therefore of paramount importance to improve our understanding of links between Indian Ocean Sea Surface Temperature (SST) variability, climate change, and sustainability of reef ecosystems. Here we present tw...
Data
Supplementary Figures 1-16, Supplementary Tables 1-9 and Supplementary References.
Article
Paleoclimate reconstructions based on reef corals require precise detection of diagenetic alteration. Secondary calcite can significantly affect paleotemperature reconstructions at very low amounts of ∼1%. X-ray powder diffraction is routinely used to detect diagenetic calcite in aragonitic corals. This procedure has its limitations as single powde...
Chapter
Full-text available
Spectral luminescence scanning (SLS) is a novel technique that uses a UV light source and line-scan camera to generate photoluminescence images of carbonate materials, such as corals. The camera in the Avaatech XRF core scanner records luminescence signals in three spectral domains of visual light, providing Red, Green and Blue (RGB) luminescence i...
Article
Full-text available
Australian scientists are world leaders in developing robust palaeo-environmental reconstructions from coral archives, relevant for understanding Australian climate extremes. The key issues for advancing this field are the need for high-resolution marine paleoclimate records to place the present in the context of past natural climate and sea level...
Article
Full-text available
palaeo‑environmental reconstructions from coral archives, relevant for understanding Australian climate extremes. The key issues for advancing this field are the need for high-resolution marine paleoclimate records to place the present in the context of past natural climate and sea level change, and to understand the impact of those changes on mari...
Article
Full-text available
Madagascar is an exceptional example of island biogeography. Though a large island, Madagascar’s landmass is small relative to other places in the world with comparable levels of biodiversity, endemicity, and topographic and climatic variation. Moreover, the timing of Madagascar’s human colonization and the social-ecological trajectories that follo...
Chapter
Full-text available
Spectral luminescence scanning (SLS) is a novel technique that uses a UV light source and line-scan camera to generate photoluminescence images of carbonate materials, such as corals. The camera in the Avaatech XRF core scanner records luminescence signals in three spectral domains of visual light, providing Red, Green and Blue (RGB) luminescence i...
Article
Full-text available
Many marine fishes have life history strategies that involve ontogenetic changes in the use of coastal habitats. Such ontogenetic shifts may place these species at particular risk from climate change, because the successive environments they inhabit can differ in the type, frequency and severity of changes related to global warming. We used a dendr...
Article
Full-text available
Palaeoclimate research relevant to marine systems in Australia includes the collection and analysis of: (a) shallow-water and deep-sea corals, which provide highresolution archives, (b) deep-sea sediment and ice cores, which span longer time scales, and (c) palaeoclimate modelling, which gives us insights into mechanisms, dynamics and thresholds un...
Article
Full-text available
A wide range of sea surface temperature (SST) expressions have been observed during the El Niño–South- ern Oscillation events of 1950–2010, which have occurred simultaneously with different global atmospheric circu- lations. This study examines the atmospheric circulation and precipitation during December–March 1950–2010 over the African Continent...