FN Archimer Export Format
PT J
TI Large icebergs characteristics from altimeter waveforms analysis
BT 
AF TOURNADRE, Jean
   BOUHIER, Nicolas
   GIRARD-ARDHUIN, Fanny
   REMY, F.
AS 1:1;2:1;3:1;4:2;
FF 1:PDG-ODE-LOS;2:PDG-ODE-LOS;3:PDG-ODE-LOS;4:;
C1 IFREMER, Lab Oceanog Spatiale, Plouzane, France.
   UPS, CNRS, IRD, CNES,LEGOS, Toulouse, France.
C2 IFREMER, FRANCE
   UNIV TOULOUSE, FRANCE
SI BREST
SE PDG-ODE-LOS
UM LOPS
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 3.318
TC 35
UR https://archimer.ifremer.fr/doc/00256/36719/35333.pdf
LA English
DT Article
DE ;iceberg;Antarctica;altimetry;ice balance
AB Large uncertainties exist on the volume of ice transported by the Southern Ocean large icebergs, a key parameter for climate studies, because of the paucity of information, especially on iceberg thickness. Using icebergs tracks from the National Ice Center (NIC) and Brigham Young University (BYU) databases to select altimeter data over icebergs and a method of analysis of altimeter waveforms, a database of 5366 icebergs freeboard elevation, length, and backscatter covering the 2002–2012 period has been created. The database is analyzed in terms of distributions of freeboard, length, and backscatter showing differences as a function of the iceberg's quadrant of origin. The database allows to analyze the temporal evolution of icebergs and to estimate a melt rate of 35–39 m·yr−1 (neglecting the firn compaction). The total daily volume of ice, estimated by combining the NIC and altimeter sizes and the altimeter freeboards, regularly decreases from 2.2 104km3 in 2002 to 0.9 104km3 in 2012. During this decade, the total loss of ice ( inline image km3·yr−1) is twice as large as than the input ( inline image km3·yr−1) showing that the system is out of equilibrium after a very large input of ice between 1997 and 2002. Breaking into small icebergs represents 80% ( inline image km3·yr−1) of the total ice loss while basal melting is only 18% ( inline image km3·yr−1). Small icebergs are thus the major vector of freshwater input in the Southern Ocean.
PY 2015
PD MAR
SO Journal Of Geophysical Research-oceans
SN 0148-0227
PU Amer Geophysical Union
VL 120
IS 3
UT 000353900000028
BP 1954
EP 1974
DI 10.1002/2014JC010502
ID 36719
ER

EF