AGU
☆Geochemistry, Geophysics, Geosystems☆
特になし
☆Geophysical Research Letters☆
1. A
connection to deep groundwater alters ecosystem carbon fluxes and budgets:
example from a Costa Rican rainforest
David P. Genereux, Laura A. Nagy,
Christopher L. Osburn and Steven F. Oberbauer
Key Points
・Input of regional
groundwater can alter ecosystem C concentrations and fluxes
・This must be
considered for accurate assessment of C budget & source/sink status
2.
Regional patterns and proximal causes of the recent snowpack decline in the
Rocky Mountains, USA
Gregory T. Pederson, Julio L. Betancourt
and Gregory J. McCabe
Key Points
・Post-1980s
west-wide snowpack declines are driven by spring (Feb-Mar) warming
・Low to middle
elevation spring snow cover declined by 20%
・Recent declines
reflect a positive reinforcement of anthropogenic warming
3.
Convectively Injected Water Vapor in the North American Summer Lowermost
Stratosphere
Michael J. Schwartz, William G. Read,
Michelle L. Santee, Nathaniel J. Livesey, Lucien Froidevaux, Alyn Lambert and
Gloria L. Manney
Key Points
・Aircraft
encounter convectively injected water in the N American stratosphere.
・Satellite
observations show regions/seasons of stratospheric H2O enhancement.
・Associated
chlorine activation/ozone loss, if present, is at very low levels.
4. A
canonical response of precipitation characteristics to Global Warming from
CMIP5 models
William K.-M. Lau, H.-T. Wu and K.-M. Kim
Key Points
・A canonical
rainfall response is found in CMIP-5 models
・increased floods
and droughts under global warming are connected
・Changing rainfall
types are more sensitive than total rainfall
5.
Extratropical forcing of ENSO
Ghyslaine Boschat, Pascal Terray and
Sébastien Masson
Key Points
・definition of a
new extratropical SST precursor for ENSO predictability
・the new precursor
offers an independent source of forcing for ENSO
・accurate
prediction of the amplitude of ENSO events during recent decades
6.
Role of mode and intermediate waters in future ocean acidification: analysis of
CMIP5 models
L. Resplandy, L. Bopp, J. C. Orr and J. P.
Dunne
Key Points
・Highest
acidification rates are located in mode and intermediate waters (MIW)
・MIW combine large
carbon uptake with high pH sensitivity to increasing CO2
・Low pH in MIW
could influence surface pH in upwelling regions
7. The
International Bathymetric Chart of the Southern Ocean (IBCSO) Version 1.0 – A
new bathymetric compilation covering circum-Antarctic waters
Jan Erik Arndt, Hans Werner Schenke, Martin
Jakobsson, Frank O. Nitsche, Gwen Buys, Bruce Goleby, Michele Rebesco, Fernando
Bohoyo, Jongkuk Hong, Jenny Black, Rudolf Greku, Gleb Udintsev, Felipe Barrios,
Walter Reynoso-Peralta, Morishita Taisei and Rochelle Wigley
Key Points
・The first regional
bathymetric compilation covering the entire Southern Ocean
・A new keystone
dataset for Antarctic research
・The southern
equivalent to IBCAO is now released
8.
Surface ozone variability and the jet position: Implications for projecting
future air quality
Elizabeth A. Barnes and Arlene M. Fiore
Key Points
・Ozone variability
is a function of the jet position
・Surface ozone
variability follows the jet in future climate simulations
・Regional
ozone-temperature relationships may change in the future
9.
Initial-value predictability of Antarctic sea ice in the Community Climate
System Model 3
Marika M Holland, Edward
Blanchard-Wrigglesworth, Jennifer Kay and Steven Vavrus
Key Points
・Antarctic ice
predictability on seasonal to inter-annual timescales is assessed
・Results suggest
significant predictability with an eastward propagating signal
・A re-emergence of
predictability occurs due to ocean heat content anomalies
10.
On the Nature of Meandering of the Springtime Western Boundary Current in the
Bay of Bengal
Avijit Gangopadhyay, G.N. Bharat Raj, Ayan
H. Chaudhuri, M. T. Babu and Debasis Sengupta
Key Points
・WBC in BOB is
continuous along the coast and separates at around 18N
・The mean WBC has
two anticyclones on its offshore side
・Interannual
variability includes cyclonic eddies on the inshore side of the WBC
11.
Changes to Environmental Parameters that Control Tropical Cyclone Genesis under
Global Warming
Hiroyuki Murakami, Tim Li and Melinda Peng
Key Points
・Environmental
variables controlling TC genesis will change under global warming
・Predicting TC
genesis events will become easier under the warmed environment
・TC genesis in the
NA resembles more like that in the current WNP climate state
12.
Prevalence of strong bottom currents in the greater Agulhas system
Meghan F. Cronin, Tomoki Tozuka, Arne
Biastoch, Jonathan V. Durgadoo and Lisa M. Beal
Key Points
・Strong bottom
currents are prevalent beneath surface jets in the Agulhas system
・Surface currents
can affect formation of contourites
・Noncohesive
sediment is lifted more easily by dust storms than by benthic storms
13.
Towards resolution-independent dust emissions in global models: Impacts on the
seasonal and spatial distribution of dust
D. A. Ridley, C. L. Heald, J. R. Pierce and
M. J. Evans
Key Points
・Better
representation of sub-grid winds reduces resolution dependence of dust
・Improved dust
seasonality and spatial distribution for coarse resolution models
・Sea-salt
emissions are found to be relatively independent of model resolution
14.
Future European temperature change uncertainties reduced by using land heat
flux observations
Annemiek I. Stegehuis, Adriaan J. Teuling,
Philippe Ciais, Robert Vautard and Martin Jung
Key Points
・European
temperature projection uncertainty can be reduced by flux observations
・ENSEMBLES
temperature projections might be underestimated in parts of Europe
15.
Quasi-Stationary North Equatorial Undercurrent Jets across the Tropical North
Pacific Ocean
Bo Qiu, Daniel L. Rudnick, Shuiming Chen
and Yuji Kashino
Key Points
・Three,
spatially-coherent, eastward flowing jets beneath westward-flowing NEC.
・NEUC jet cores
tend to migrate northward when the jets progress eastward.
・Jets tend to
shoal to lighter density surfaces, as they progress eastward.
☆JGR Oceans☆
1.
Sea ice thickness estimations from ICESat Altimetry over the Bellingshausen and
Amundsen Seas, 2003-2009
Hongjie Xie, Ahmet Emre Tekeli, Stephen F.
Ackley, Donghui Yi and H. Jay Zwally
Key Points
・evaluation of two
different methods for estimating ice thickness from ICESat
・empirical
equation is preferable than the buoyancy equation for the region
・AMSR-E snow depth
counting for 95% ice thickness overestimation
2.
Mechanisms of aerosol-forced AMOC variability in a state of the art climate
model
Matthew B Menary, Christopher D Roberts,
Matthew D Palmer, Paul R Halloran, Laura Jackson, Richard A Wood, Wolfgang A
Mueller, Daniela Matei and Sang-Ki Lee
Key Points
・Aerosols force a
long term AMOC strengthening in HadGEM2-ES of ~3Sv
・This occurs via
atmospheric circulation modulating the NA freshwater budget
・Independent ocean
models and atmospheric analyses provide qualitative support
3.
Detecting Labrador Sea Water formation from space
R. Gelderloos, C. A. Katsman and K. Våge
Key Points
・Labrador Sea
Water can be detected using satellite altimetry data
4.
Seasonal variability of water masses and transport on the Antarctic continental
shelf and slope in the southeastern Weddell Sea
Jennifer A. Graham, Karen J. Heywood,
Cédric P. Chavanne and Paul R. Holland
Key Points
・Wind stress plays
a key role determining Antarctic water mass characteristics.
・Autumn freshening
is strongly influenced by increased along-shore advection.
・Antarctic Slope
Current peaks during Fall, when wind stress increases.
5.
Annual maximum water levels from tide gauges: Contributing factors and
geographic patterns
Mark A. Merrifield, Ayesha S. Genz,
Christopher P. Kontoes and John J. Marra
Key Points
・Mean annual
maximum water levels can be specified on a global scale
・Tidal and
non-tidal contributions to annual maximum water levels are quantified
☆Paleoceanography☆
1. Atlantic Water advection versus sea-ice advances in
the eastern Fram Strait during the last 9 ka – multiproxy evidence for a
two-phase Holocene
Kirstin Werner,
Robert F. Spielhagen, Dorothea Bauch, H. Christian Hass and Evgeniya Kandiano
Key Points
・Stepwise
transition of Holocene to modern situationin eastern Fram Strait
・Strong heat flux
9-5 ka, coolings at 8.2., 6.9, 6.1, and 5.2 ka
・Neoglacial
parallel to flooding of Arctic shelves/modern sea-ice production
2. Erosion and reworking of Pacific sediments near the
Eocene-Oligocene boundary
Ted C. Moore Jr.
Key Points
・Reworking of
Eocene radiolarians occurred as pulses through the late Eocene
・Largest reworking
pulses at in the E/O boundary interval
・Physical erosion
and redeposition likely caused by internal wave turbulence
EGU
☆Climate of the past☆
1. Impact of precipitation intermittency on
NAO-temperature signals in proxy records
M. Casado, P. Ortega, V. Masson-Delmotte, C. Risi, D. Swingedouw, V. Daux,
D. Genty, F. Maignan, O. Solomina, B. Vinther, N. Viovy, and P. Yiou
