Publication Date:
2020-11-18
Description:
By analyzing surface latent heat flux (SLHF) data from the NCEP/NCAR Reanalysis Project for the period three months before and after the Sept. 3, 2010 MS 7.1 New Zealand earthquake, an isolated SLHF positive anomaly on Aug. 1, 2010 was found with a
high value of about 160 W/m2 to the northeast of the epicenter. Historical data, background pixels, and wavelet transforms of time series were comprehensively analyzed to study the spatiotemporal features of the SLHF anomaly. After removing the influences
of wind speed and cloud cover, the key factor leading to local SLHF anomalies is the surface temperature increment. Combined
with GPS displacement observations and tectonic settings, we determined that the physical mechanism of the SLHF anomaly could possibly be attributed to hot underground materials related to high-temperature and high-pressure upwelling from the deep crust and mantle along the nearby subduction zone, thereby explaining the local temperature increment to the northeast of the epicenter, as well as in the center of the North Island and the southwest of the South Island. Furthermore, it changed the specific humidity between the ground and surface air, causing the local SLHF increment.
Description:
Published
Description:
3273-3280
Description:
1.7. Osservazioni di alta e media atmosfera
Description:
1.10. TTC - Telerilevamento
Description:
3.1. Fisica dei terremoti
Description:
JCR Journal
Description:
open
Keywords:
remote sensing
;
earthquakes
;
precursors
;
01. Atmosphere::01.01. Atmosphere::01.01.05. Radiation
;
04. Solid Earth::04.02. Exploration geophysics::04.02.05. Downhole, radioactivity, remote sensing, and other methods
;
04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
