Geophysical Research Letters
SCOPUS (1974-2025)SCIE-ISI
0094-8276
1944-8007
Mỹ
Cơ quản chủ quản: AMER GEOPHYSICAL UNION , Wiley-Blackwell
Lĩnh vực:
Earth and Planetary Sciences (miscellaneous)Geophysics
Phân tích ảnh hưởng
Các bài báo tiêu biểu
The Arctic oscillation signature in the wintertime geopotential height and temperature fields
Tập 25 Số 9 - Trang 1297-1300 - 1998
The leading empirical orthogonal function of the wintertime sea‐level pressure
field is more strongly coupled to surface air temperature fluctuations over the
Eurasian continent than the North Atlantic Oscillation (NAO). It resembles the
NAO in many respects; but its primary center of action covers more of the
Arctic, giving it a more zonally symmetric appearance. Coupled to strong
fluctuations at...
Effect of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions
Tập 21 Số 20 - Trang 2191-2194 - 1994
Recent revisions to the geomagnetic time scale indicate that global plate motion
model NUVEL‐1 should be modified for comparison with other rates of motion
including those estimated from space geodetic measurements. The optimal
recalibration, which is a compromise among slightly different calibrations
appropriate for slow, medium, and fast rates of seafloor spreading, is to
multiply NUVEL‐1 angula...
Ubiquity and dominance of oxygenated species in organic aerosols in anthropogenically‐influenced Northern Hemisphere midlatitudes
Tập 34 Số 13 - 2007
Organic aerosol (OA) data acquired by the Aerosol Mass Spectrometer (AMS) in 37
field campaigns were deconvolved into hydrocarbon‐like OA (HOA) and several
types of oxygenated OA (OOA) components. HOA has been linked to primary
combustion emissions (mainly from fossil fuel) and other primary sources such as
meat cooking. OOA is ubiquitous in various atmospheric environments, on average
accounting ...
Arctic sea ice decline: Faster than forecast
Tập 34 Số 9 - 2007
From 1953 to 2006, Arctic sea ice extent at the end of the melt season in
September has declined sharply. All models participating in the
Intergovernmental Panel on Climate Change Fourth Assessment Report (IPCC AR4)
show declining Arctic ice cover over this period. However, depending on the time
window for analysis, none or very few individual model simulations show trends
comparable to observatio...
Radar interferogram filtering for geophysical applications
Tập 25 Số 21 - Trang 4035-4038 - 1998
The use of SAR interferometry is often impeded by decorrelation from thermal
noise, temporal change, and baseline geometry. Power spectra of interferograms
are typically the sum of a narrow‐band component combined with broad‐band noise.
We describe a new adaptive filtering algorithm that dramatically lowers phase
noise, improving both measurement accuracy and phase unwrapping, while
demonstrating ...
Accelerated decline in the Arctic sea ice cover
Tập 35 Số 1 - 2008
Satellite data reveal unusually low Arctic sea ice coverage during the summer of
2007, caused in part by anomalously high temperatures and southerly winds. The
extent and area of the ice cover reached minima on 14 September 2007 at 4.1 ×
106 km2 and 3.6 × 106 km2, respectively. These are 24% and 27% lower than the
previous record lows, both reached on 21 September 2005, and 37% and 38% less
than t...
Initial performance assessment of CALIOP
Tập 34 Số 19 - 2007
The Cloud‐Aerosol Lidar with Orthogonal Polarization (CALIOP, pronounced the
same as “calliope”) is a spaceborne two‐wavelength polarization lidar that has
been acquiring global data since June 2006. CALIOP provides high resolution
vertical profiles of clouds and aerosols, and has been designed with a very
large linear dynamic range to encompass the full range of signal returns from
aerosols and c...
Emergence of broadband Rayleigh waves from correlations of the ambient seismic noise
Tập 31 Số 7 - 2004
We demonstrate that the coherent information about the Earth structure can be
extracted from the ambient seismic noise. We compute cross‐correlations of
vertical component records of several days of seismic noise at different pairs
of stations separated by distances from about one hundred to more than two
thousand kilometers. Coherent broadband dispersive wavetrains clearly emerge
with group veloc...
Remote estimation of canopy chlorophyll content in crops
Tập 32 Số 8 - 2005
Accurate estimation of spatially distributed chlorophyll content (Chl) in crops
is of great importance for regional and global studies of carbon balance and
responses to fertilizer (e.g., nitrogen) application. In this paper a recently
developed conceptual model was applied for remotely estimating Chl in maize and
soybean canopies. We tuned the spectral regions to be included in the model,
accordi...
Nd isotopic variations and petrogenetic models
Tập 3 Số 5 - Trang 249-252 - 1976
The decay of 147Sm to 143Nd allows 143Nd/144Nd to be used to trace Sm/Nd
fractionation in long time‐scale geologic processes. 143Nd/144Nd has been
measured in terrestrial rock samples of different ages to establish the
characteristics of Nd isotopic evolution in the crust and mantle. The evolution
of 143Nd/144Nd in the mantle indicates Sm/Nd essentially equal to that of
chondrites, and implies a c...