Sentences with phrase «geochemical changes»

Orr et al. (2005) estimate that 21st century climate change could possibly counteract less than 10 % of the projected direct geochemical changes.

This accounted for the anomalous electrical response and revealed the usefulness of such measurements for monitoring mineralogical and geochemical changes accompanying subsurface bioremediation.

«This new information will allow us to define the relationship between microbial activity and the geochemical changes that occur as a result of acetate addition.

«It's probably too early to conclude exactly which geochemical changes in the Ediacaran oceans were responsible for the shift to large body sizes, but there are strong contenders, especially increased oxygen, which animals need for respiration.»

Not exact matches

That would change the chemistry happening on the planet in a way that could make any signs of life tricky to distinguish from geochemical processes.

Downcore changes in carbon and sulfur cycling show discrete geochemical intervals with chemoautotrophic δ13C signatures locally attenuated by heterotrophic metabolism.

Geochemical records from measurements of the foraminifera shells and fauna analyses will help us evaluate the changes in methane emissions, while studies of living and fossil species distribution and abundance of the benthic foraminifera community in methane seep areas will indicate the degree of methane release through time.

A new study has found geochemical clues near the summit of volcanic Mauna Kea that tell a story of ancient glacier formation, the influence of the most recent ice age, more frequent major storms in Hawaii, and the impact of a distant climatic event that changed much of the world.

After participation in a ship expedition with RV SONNE to the North Pacific in summer 2018, the tasks include to reconstruct the spatial and temporal changes in near - surface and subsurface water temperatures in the North Pacific, salinity, thermocline depth, and water mass stratification of the upper oceanic surface using geochemical proxy parameters, e.g. in planktic microfossils.

«The extraordinarily young age of this lunar sample either means that the Moon solidified significantly later than previous estimates, or that we need to change our entire understanding of the Moon's geochemical history,» Carlson said.

Of particular interests are the remote sensing and laboratory analogue studies of martian hydrated minerals, geochemical and mineralogical analysis of lunar materials, geological evolution and environmental changes of planetary bodies, planetary Raman and LIBS spectroscopy, etc..

We followed monthly changes in water's and sediment geochemical characteristics at thirty - two sites spanning the Pescadero Estuary over a one - year period.

[Response: The problem with hypotheising ozone changes in the past is that ozone leaves no unique geochemical trace, and thus you have to rely on models completely to fill in the gaps.

Once the ice reaches the equator, the equilibrium climate is significantly colder than what would initiate melting at the equator, but if CO2 from geologic emissions build up (they would, but very slowly — geochemical processes provide a negative feedback by changing atmospheric CO2 in response to climate changes, but this is generally very slow, and thus can not prevent faster changes from faster external forcings) enough, it can initiate melting — what happens then is a runaway in the opposite direction (until the ice is completely gone — the extreme warmth and CO2 amount at that point, combined with left - over glacial debris available for chemical weathering, will draw CO2 out of the atmosphere, possibly allowing some ice to return).

They include the physical, chemical and biological processes that control the oceanic storage of carbon, and are calibrated against geochemical and isotopic constraints on how ocean carbon storage has changed over the decades and carbon storage in terrestrial vegetation and soils, and how it responds to increasing CO2, temperature, rainfall and other factors.

Scientists extract core samples from living corals by scuba diving and collecting a sample from the coral skeleton; geochemical analyses of these samples reveals how ocean temperature, circulation, and salinity change over time.

The main driver of these changes is the direct geochemical effect due to the addition of anthropogenic CO2 to the surface ocean (see Box 7.3).

There are a diverse range of biological and geochemical signatures that can be interpreted as direct or indirect indicators of hydrological change.

Ken Caldeira has been a Carnegie investigator since 2005 and is world renowned for his modeling and other work on the global carbon cycle; marine biogeochemistry and chemical oceanography, including ocean acidification and the atmosphere / ocean carbon cycle; land - cover and climate change; the long - term evolution of climate and geochemical cycles; climate intervention proposals; and energy technology.