Cristiano Mazur Chiessi
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View article: Vegetation and fire regimes in the Neotropics over the last 21 000 years
Vegetation and fire regimes in the Neotropics over the last 21 000 years Open
Vegetation and fire activity have dynamically changed in response to past variations in global and regional climate. Here we investigate these responses across the Neotropics based on the analysis of modern vegetation distribution and fire…
View article: Tipping points in ocean and atmosphere circulations
Tipping points in ocean and atmosphere circulations Open
Continued anthropogenic pressures on the Earth system hold the potential to disrupt established circulation patterns in the ocean and atmosphere. In this narrative review, we investigate tipping points in these systems by assessing scienti…
View article: Low variability of the Atlantic Meridional Overturning Circulation throughout the Holocene
Low variability of the Atlantic Meridional Overturning Circulation throughout the Holocene Open
Earth system models and paleo-reconstructions indicate that shifts in Atlantic Meridional Overturning Circulation (AMOC) strength profoundly impact global climate. While the last glacial termination experienced large AMOC variations, evide…
View article: Coral Data Reveal the Impact of the Great Acceleration on the Carbon Cycle in the Western Tropical South Atlantic
Coral Data Reveal the Impact of the Great Acceleration on the Carbon Cycle in the Western Tropical South Atlantic Open
The Great Acceleration is defined as a series of unprecedented, global human‐driven changes that occurred across socio‐economic and natural compartments of the Earth system after 1950. Among the observed changes, increase in fossil fuel bu…
View article: A Ship Grounding Over a Century Ago Left a Lasting Channel Among Corals
A Ship Grounding Over a Century Ago Left a Lasting Channel Among Corals Open
Among disturbance events to coral reef ecosystems, ship groundings can be among the most acute due to the physical damage they cause to coral reef habitats. Following ship groundings, monitoring studies show that some reefs recover whereas…
View article: Vegetation and fire regimes in the Neotropics over the last 21,000 years
Vegetation and fire regimes in the Neotropics over the last 21,000 years Open
Vegetation and fire activity have dynamically changed in response to past variations in global and regional climate. Here we investigate these responses across the Neotropics based on the analysis of modern vegetation distribution and fire…
View article: Trace element and OH content of quartz grains in the Amazon river: Potential application in provenance analysis
Trace element and OH content of quartz grains in the Amazon river: Potential application in provenance analysis Open
Quartz grains in sediment carried by the Amazon River and five of its major tributaries were analyzed by FTIR-spectroscopy and secondary ion mass spectrometry to evaluate their potential for provenance analysis. Additionally, heavy mineral…
View article: Asynchronous Poleward Migration of the Atlantic Subtropical Gyres Over the Past 22,000 years
Asynchronous Poleward Migration of the Atlantic Subtropical Gyres Over the Past 22,000 years Open
By exchanging huge amounts of heat between the tropics and high latitudes, subtropical gyres significantly impact Earth's energy balance. Yet, their dynamical changes during the last deglaciation remain poorly understood. Here, nine record…
View article: Are Amazonian Quaternary Ironstones Revealing Past Hydro-Geochemistry?
Are Amazonian Quaternary Ironstones Revealing Past Hydro-Geochemistry? Open
View article: Two-Phased Itcz-Driven Upper Salinity Stratification in the Western Equatorial Atlantic During Heinrich Stadial 11
Two-Phased Itcz-Driven Upper Salinity Stratification in the Western Equatorial Atlantic During Heinrich Stadial 11 Open
View article: Lessons from paleoclimates for recent and future climate change: opportunities and insights
Lessons from paleoclimates for recent and future climate change: opportunities and insights Open
Paleoclimate information has played an instrumental role in showing how fast climate can vary and how large these changes can be. It provided the first vivid demonstration of the relationships between atmospheric greenhouse gas concentrati…
View article: A 2-Million-Year Record of Amazon Climate
A 2-Million-Year Record of Amazon Climate Open
During the Quaternary Period, major fluctuations between wet and dry climate have been implicated in the expansion and contraction of the Amazon forests and associated changes in their biodiversity. Yet, most of the Quaternary Period in th…
View article: South Atlantic Multi‐Site Calibration of Coral Oxygen Isotope Paleothermometer
South Atlantic Multi‐Site Calibration of Coral Oxygen Isotope Paleothermometer Open
Coral‐based stable oxygen isotopes (δ 18 O) have been used as a proxy for sea surface temperature (SST) since the 1970s, and δ 18 O–SST calibration studies have been fundamental to assure robust and faithful SST reconstructions. Paleoclima…
View article: Comment on egusphere-2023-2589
Comment on egusphere-2023-2589 Open
Abstract. In this review, we assess scientific evidence for tipping points in ocean and atmosphere circulations. The warming of oceans, modified wind patterns and increasing freshwater influx from melting ice hold the pote…
View article: Using Multi‐Homolog Plant‐Wax Carbon Isotope Compositions to Reconstruct Tropical Vegetation Types
Using Multi‐Homolog Plant‐Wax Carbon Isotope Compositions to Reconstruct Tropical Vegetation Types Open
The stable carbon isotope composition (δ 13 C) of plant components such as plant wax biomarkers is an important tool for reconstructing past vegetation. Plant wax δ 13 C is mainly controlled by photosynthetic pathways, allowing for the dif…
View article: Determinants on foraminiferal stable carbon isotopes offshore Cape Blanc, NW Africa
Determinants on foraminiferal stable carbon isotopes offshore Cape Blanc, NW Africa Open
The region offshore Cape Blanc, NW Africa, is one of the most productive zones in the world’s oceans due to the occurrence of an eastern boundary upwelling system and dust input from the Sahara. It is also a well-known site for benth…
View article: Holocene Variability of the AMOC as derived from 231Pa/230Th
Holocene Variability of the AMOC as derived from 231Pa/230Th Open
Climate models and paleo-reconstructions suggest that alterations in the Atlantic Meridional Overturning Circulation (AMOC) are not only indicators but also drivers of climate changes. Therefore, the AMOC is considered a critical tipping e…
View article: Climate tipping point interactions and cascades: a review
Climate tipping point interactions and cascades: a review Open
Climate tipping elements are large-scale subsystems of the Earth that may transgress critical thresholds (tipping points) under ongoing global warming, with substantial impacts on the biosphere and human societies. Frequently studied examp…
View article: Glacial-Interglacial Changes in Antarctic Intermediate Water Advection in the Southeast Pacific During the Last 787 Kyr
Glacial-Interglacial Changes in Antarctic Intermediate Water Advection in the Southeast Pacific During the Last 787 Kyr Open
View article: Using Multi-Homologue Plant-Wax Carbon Isotope Signatures to Reconstruct Tropical Vegetation Types
Using Multi-Homologue Plant-Wax Carbon Isotope Signatures to Reconstruct Tropical Vegetation Types Open
The stable carbon isotope composition (δ13C) of plant components such as plant wax biomarkers is an important tool for reconstructing past vegetation. Plant wax δ13C is mainly controlled by photosynthetic pathways, allowing for the differe…
View article: Summer insolation controlled movements of Intertropical Convergence Zone during last glacial cycle in northern South America
Summer insolation controlled movements of Intertropical Convergence Zone during last glacial cycle in northern South America Open
A paradigm in paleoclimatology holds that shifts in the mean position of the Intertropical Convergence Zone were the dominant climatic mechanism controlling rainfall in the tropics during the last glacial period. We present a new paleo-rai…
View article: Tipping points in ocean and atmosphere circulations
Tipping points in ocean and atmosphere circulations Open
In this review, we assess scientific evidence for tipping points in ocean and atmosphere circulations. The warming of oceans, modified wind patterns and increasing freshwater influx from melting ice hold the potential to disrupt establishe…
View article: Supplementary material to "Tipping points in ocean and atmosphere circulations"
Supplementary material to "Tipping points in ocean and atmosphere circulations" Open
View article: Long-term variability of the western tropical Atlantic sea surface temperature driven by greenhouse gases and AMOC
Long-term variability of the western tropical Atlantic sea surface temperature driven by greenhouse gases and AMOC Open
View article: GDGT distribution in tropical soils and its potential as a terrestrial paleothermometer revealed by Bayesian deep-learning models
GDGT distribution in tropical soils and its potential as a terrestrial paleothermometer revealed by Bayesian deep-learning models Open
Branched and isoprenoidal glycerol dialkyl glycerol tetraethers (br- and isoGDGTs) are membrane lipids produced by bacteria and archaea, respectively. These lipids form the basis of several frequently used paleoclimatic proxies. For exampl…
View article: Comment on egusphere-2023-1576
Comment on egusphere-2023-1576 Open
Abstract. Climate tipping elements are large-scale subsystems of the Earth that may transgress critical thresholds (tipping points) under ongoing global warming, with substantial impacts on biosphere and human societies. F…
View article: Comment on egusphere-2023-1576
Comment on egusphere-2023-1576 Open
Abstract. Climate tipping elements are large-scale subsystems of the Earth that may transgress critical thresholds (tipping points) under ongoing global warming, with substantial impacts on biosphere and human societies. F…
View article: A Comparison Study of Mg/Ca‐, Alkenone‐, and TEX<sub>86</sub>‐Derived Temperatures for the Brazilian Margin
A Comparison Study of Mg/Ca‐, Alkenone‐, and TEX<sub>86</sub>‐Derived Temperatures for the Brazilian Margin Open
The reconstruction of accurate sea‐surface temperatures (SST) is of utmost importance due to the ocean's central role in the global climate system. Yet, a number of environmental processes might bias reliable SST estimations. Here, we inve…
View article: Climate tipping point interactions and cascades: A review
Climate tipping point interactions and cascades: A review Open
Climate tipping elements are large-scale subsystems of the Earth that may transgress critical thresholds (tipping points) under ongoing global warming, with substantial impacts on biosphere and human societies. Frequently studied examples …
View article: Western South Atlantic seasonal variability recorded in a mid-deglacial bivalve from the outer Uruguayan continental shelf
Western South Atlantic seasonal variability recorded in a mid-deglacial bivalve from the outer Uruguayan continental shelf Open