『Abstract
Long-term climate moderation is commonly attributed to chemical
weathering; the greater the temperature and precipitation the
faster the weathering rate. To test this widely-held hypothesis,
we performed a field study and determined the weathering rates
of eight nearly pristine north-east Iceland river catchments with
varying glacial cover over 44 y. Statistically significant linear
positive correlations were found between mean annual temperature
and chemical weathering in all eight catchments and between mean
annual temperature and mechanical weathering and runoff in seven
of the eight catchments. The runoff, mechanical weathering flux,
and chemical weathering fluxes in these catchments are found to
increase from 6 to 16%, 8 to 30%、and 4 to 14%, respectively, depending
on the catchment for each degree of temperature increase. Positive
correlations were found between time and mechanical and chemical
weathering for all catchments. In summary, these results demonstrate
a significant feedback between climate and Earth surface weathering,
and suggest that this weathering rate is currently increasing
with time due to global warming.
Keywords: climate moderation; chemical weathering; CO2
fixation; global carbon cycle.』
Introduction
Material and methods
Results and discussion
References