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Observations of two special kinds of tremor at Galeras volcano, Colombia(1989-1991)
Galeras volcano harmonic tremor spasmodic tremor degassing activity resonance crack
2015/10/8
Since the reactivation of Galeras volcano in 1988 its seismic activity has been dominated by a variety of LP waveforms and tremor events. Some of these signals occurred as a response to volcanic activ...
Influence of seismic activity on the atmospheric electric field in Lisbon (Portugal) from 1955 to 1991
Atmospheric electric field seismic activity LAI coupling
2015/8/24
In the present study, we considered the influence of seismic activity on the atmospheric electric field recorded at Portela meteorological station (Lisbon, Portugal) for the period from 1955 to 1991. ...
TOGA-TAO and the 1991–93 El Nino Southern Oscillation Event
TOGA-TAO Nino Southern Oscillation Event
2015/8/19
The El Niño-Southern Oscillation (ENSO) phenomenon is an interannual perturbation of the climate system characterized by aperiodic weakening of the tradewinds and warming of the surface layers in...
Kinematics of the 1991 Randa rockslides (Valais, Switzerland)
Kinematics the 1991 Randa rockslides
2009/12/10
The various mechanisms of degradation that led to the final loss of equilibrium required various amounts of time. During the late-and post-glacial periods, seismic activity and weathering of the ortho...
Short-term climatic impact of the 1991 volcanic eruption of Mt. Pinatubo and effects on atmospheric tracers
Short-term climatic impact the 1991 volcanic eruption Mt. Pinatubo atmospheric tracers
2009/12/9
Large explosive volcanic eruptions are capable of injecting considerable amounts of particles and sulphur gases (mostly sulphur dioxide) above the tropopause, causing increases in the stratospheric ae...
Lagrangian drifter paths and length scales in the tropical Pacific warm pool from 1990 to 1991:with application of fractal techniques
Lagrangian drifter paths length scales tropical Pacific warm pool fractal techniques
2009/11/16
This paper presents an analysis of WOCE/TOGA surface drifter paths and its interpretation in conjunction with the west Pacific warm pool water motion. Our interest here lies in the existence of scale ...
Field Investigation of the Thermal Bar in Lake Ladoga,Spring 1991
Field Investigation Thermal Bar Lake Ladoga
2009/10/26
The thermal bar in Lake Ladoga was studied during one week in May 1991.
Temperature and current velocity distributions were measured. The movement
of the thermal bar and the horizontal heat transpor...
ECLIPSE OF JUPITER SATELLITE IO BY EUROPA ON APRIL 3,1991 OBSERVED AT BELGRADE OBSERVATORY
JUPITER SATELLITE ECLIPSE
2009/4/21
ECLIPSE OF JUPITER SATELLITE IO BY EUROPA ON APRIL 3,1991 OBSERVED AT BELGRADE OBSERVATORY。
Ozone loss and chlorine activation in the Arctic winters 1991-2003 derived with the tracer-tracer correlations
Ozone loss chlorine activation Arctic winters tracer-tracer correlations
2009/3/9
Chemical ozone loss in the Arctic stratosphere was investigated for the twelve years between 1991 and 2003 employing the ozone-tracer correlation method. For this method, the change in the relation be...
利用McMurdo 和Thule台站的观测资料以及我国广州宇宙线台站的观测资料，分 析了1991年3月24日特大磁暴的日冕物质抛射(简称：CME)的部分特征. 分析结果表明CME到 达磁层时，其运动 方向不是正对着磁层顶而是一定程度地偏向地球南半球；这次事件引起银河宇宙线强度出现 三次Forbush下降. CME中含有很强的磁场结构，最强的磁场结构是在1991年3月24日20：00U T 左右到达...
Observations of Deep Convection in the Gulf of Lions, Northern Mediterranean, during the Winter of 1991/92
acoustic Doppler current profiler Deep Convection
2008/12/9
During December 1991 to April 1992 measurements with moored acoustic Doppler current profiler (ADCP) stations and shipboard surveys were carried out in the convection regime of the Gulf of Lions, nort...
Circulation and Low-Frequency Variability near the Chilean Coast：Remotely Forced Fluctuations during the 1991–92 El Niño
Circulation Low-Frequency Variability Chilean Coast
2008/11/12
Results are reported from the first long, recording current meter observations over the slope off Chile. These observations, at 30°S during the 1991–92 El Niño event, are analyzed together with...
Long-term trend of surface ozone at a regional background station in eastern China 1991–2006: enhanced variability
surface ozone eastern China
2008/11/7
Information about the long-term trends of surface and tropospheric ozone is important for assessing the impact of ozone on human health, vegetation, and climate. Long-term measurements from East Asia,...
Chemical ozone loss in winter 1991–1992 is recalculated based on observations of the HALOE satellite instrument, Version 19, ER-2 aircraft measurements and balloon data. HALOE satellite observations a...
Upper-Ocean Eddy Transports of Heat, Potential Vorticity, and Volume in the Northeastern North Atlantic—“Vivaldi 1991”
Heat Potential Vorticity Volume Northeastern North Atlantic
2008/6/20
Mesoscale eddies in the northeast North Atlantic were investigated using the SeaSoar towed CTD and ADCP data from the 1991 Vivaldi cruise. These data cover an area of 1700 km × 1500 km between 39° and...