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Journal Article
Journal: Geology
Published: 24 June 2021
Geology (2021) 49 (10): 1220–1224.
..., especially for winter, affected by a suite of strong feedbacks such as changes in sea-ice cover in the high latitudes. We present a synthesis of winter temperature and precipitation proxy data from the Atlantic seaboard of Europe, spanning from southern Iberia to the Arctic. Our data reveal distinct...
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Journal Article
Published: 28 December 2020
Journal of the Geological Society (2021) 178 (1): jgs2020-239.
... directly affected climate, not least by producing major variations in atmospheric greenhouse gas concentrations. The long-term geological perspective on climate change makes it apparent that, through changes in weathering and volcanism, and Earth system feedbacks resulting from changes in the Earth–Sun...
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Journal Article
Journal: Geology
Published: 04 November 2020
Geology (2021) 49 (3): 299–303.
... transfer of CO 2 to the atmosphere. Conversely, calcium sulfate deposition weakens greenhouse forcing, while the high depositional rates of evaporite giants may overwhelm the silicate weathering feedback, causing several degrees of planetary cooling. Non-steady-state evaporite dynamics and related...
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Journal Article
Journal: Geology
Published: 10 June 2020
Geology (2020) 48 (10): 966–970.
... marsh area decreases the sediment availability in estuarine systems through changes in regional-scale hydrodynamics. This positive feedback between marsh disappearance and the ability of coastal bays to retain sediments reduces the trapping capacity of the whole tidal system and jeopardizes the survival...
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Journal Article
Journal: Geology
Published: 28 October 2019
Geology (2020) 48 (1): 29–33.
... scales. Land plants still may cause reductions in steady-state atmospheric CO 2 levels, but via increasing the silicate weathering feedback strength, not silicate weathering rates. The mass-balance constraints on the long-term carbon cycle provide a mechanism for linking how land plant evolution...
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Journal Article
Journal: Paleobiology
Published: 14 October 2019
Paleobiology (2019) 45 (4): 517–530.
... competition in the broad sense favors winners that use and apply more power than losers; (2) greater access to material and energy sources increases the fit between organism and environment and raises the efficiency of natural selection; (3) powerful agents strengthen interdependencies and positive feedbacks...
Journal Article
Journal: Elements
Published: 01 October 2019
Elements (2019) 15 (5): 331–337.
... license as the original. carbon cycle large igneous provinces greenhouse gas climate Earth system feedback The fossil record reveals that the evolution of life has been punctuated by several catastrophic events that eliminated species globally ( Raup and Sepkoski 1982 ). After...
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Journal Article
Journal: Elements
Published: 01 October 2019
Elements (2019) 15 (5): 325–330.
... between the rate of CO 2 inputs through magmatic/metamorphic degassing and the rates of carbon removal via silicate weathering and organic carbon burial ( Berner 2004 ) ( Fig. 1 ). Due to the small size of the surface carbon reservoir relative to the inputs from the solid Earth, a negative feedback...
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Journal Article
Journal: Geology
Published: 06 September 2019
Geology (2019) 47 (10): 992–996.
... million years; therefore, a negative feedback mechanism must have stabilized the carbon cycle. Here, we present the first almost-complete Paleogene silicate weathering intensity (SWI) records from continental rocks in the northern Tibetan Plateau showing that silicate weathering in this tectonically...
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Journal Article
Journal: Elements
Published: 01 August 2019
Elements (2019) 15 (4): 259–265.
...Patrick J. Frings A feedback between Earth surface weathering and climate is thought to be fundamental in maintaining Earth's habitability over long times-cales, but investigating this control in the modern world is difficult. The geologic record of cycles between glacial and interglacial...
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Journal Article
Journal: Elements
Published: 01 August 2019
Elements (2019) 15 (4): 235–240.
...James F. Kasting Earth's climate is buffered over long timescales by a negative feedback between atmospheric CO 2 level and surface temperature. The rate of silicate weathering slows as the climate cools, causing CO 2 to increase and warming the surface through the greenhouse effect. This buffering...
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Journal Article
Journal: Elements
Published: 01 August 2019
Elements (2019) 15 (4): 229–234.
... processes that work together to govern the form and function of the Earth's surface. These processes, which include erosion, water flow, and biological activity, interact with weather and climate through multidirectional, time-varying feedbacks ( F ig . 3 ). For example, chemical weathering, physical...
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Journal Article
Published: 30 May 2019
Geological Magazine (2020) 157 (10): 1729–1746.
...Robert Spicer; Paul Valdes; Alice Hughes; Jian Yang; Teresa Spicer; Alexei Herman; Alexander Farnsworth Abstract The Arctic is warming faster than anywhere else of comparable size on Earth, impacting global climate feedbacks and the Arctic biota. However, a warm Arctic is not novel. The Late...
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Journal Article
Journal: Geology
Published: 02 May 2019
Geology (2019) 47 (7): 650–654.
... reveals that two-way negative channel-hillslope feedbacks driven by block delivery to the river result in characteristic plan-view and cross-sectional river canyon forms. Internal negative feedbacks strongly reduce the rate at which erosional signals pass through landscapes, leading to persistent local...
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Journal Article
Journal: GSA Bulletin
Published: 24 April 2019
GSA Bulletin (2019) 131 (11-12): 1920–1942.
... appear to have caused biogeomorphic feedbacks, thereby exacerbating sediment deposition, disrupting flood conveyance, and contributing to decreases in peak-flow magnitude and in sediment transport. The progressive increase in water development in parts of the basin has also likely contributed...
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Journal Article
Journal: Elements
Published: 01 April 2019
Elements (2019) 15 (2): 81–86.
...—such as the Kozeny–Carman equation for porosity–permeability feedbacks, or Archie's law for porosity–tortuosity interactions—relate the volume changes associated with geochemical reactions to the transport processes. This results in either negative or positive feedbacks between reactions and fluid flow. Positive...
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Journal Article
Journal: Elements
Published: 01 December 2018
Elements (2018) 14 (6): 367.
... year, in addition to the 90 billion tonnes cycled before humans between the atmosphere and the oceans, and the 60 billion tonnes cycled by terrestrial biota. Fortunately, the ocean takes up some of this additional carbon, but, in so doing, sets in motion a cascade of interacting feedbacks centred...
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Journal Article
Journal: Geology
Published: 26 July 2017
Geology (2017) 45 (9): 823–826.
... and terrestrial vegetation on chemical weathering intensity and erosion at Lake Malawi using a long sediment record. Fossil pollen, microcharcoal, particle size, and mineralogy data affirm that the detrital clays accumulating in deep water within the lake are controlled by feedbacks between climate and hinterland...
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Journal Article
Published: 01 May 2017
Vadose Zone Journal (2017) 16 (5): 1–20.
... of old water to streams was observed and hypothesized to be the result of macropore flow, piston flow, or transmissivity feedback depending on the season and water table position. Further investigations are recommended to increase our understanding of subsurface runoff generation mechanisms that promote...
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Journal Article
Journal: Geology
Published: 01 April 2017
Geology (2017) 45 (4): 307–310.
... and downsystem coupling mechanisms are joined in a negative feedback cycle. In this cycle, debuttressing and rebuttressing due to channel bed erosion and alluviation are the dominant controls on hillslope stability. Based on an order of magnitude estimate it is plausible that the observed feedback mechanism...
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