7069 to 7080 of 13906 results
-
-
-
A comparison of midlatitude Pi 2 pulsations and geostationary orbit particle injections as substorm indicators
Read more of: A comparison of midlatitude Pi 2 pulsations and geostationary orbit particle injections as substorm indicatorsBoth the injection of energetic particles at geostationary orbit and ground magnetic observations of Pi 2 wave activity are characteristic indicators of the onset of the substorm expansion phase. Occurrence […]
-
The polarisation of whistlers received on the ground near L = 4
Read more of: The polarisation of whistlers received on the ground near L = 4The observed polarisation of the horizontal magnetic components of whistler mode signals received at Halley, Antarctica (L≈ 4.3), is in many cases that expected from a simple model of the […]
-
-
-
-
-
High-resolution vector velocity determinations from the dynasonde
Read more of: High-resolution vector velocity determinations from the dynasondeLine-of-sight Doppler velocity V∗ and three-dimensional apparent echolocation (XL, YL, ZL), are among the principal parameters available for each ionospheric echo from most observing modes of the dynasonde. An ensemble […]
-
An Automatic Respirometer for use with Small Invertebrates
Read more of: An Automatic Respirometer for use with Small Invertebrates1. An automatic respirometer is described which has been developed to measure the rate of oxygen consumption by small arthropods in closed chambers. 2. The instrument removes 0.5 mul subsamples […]
-
Antarctic snow record of southern hemisphere lead pollution
Read more of: Antarctic snow record of southern hemisphere lead pollutionLead concentrations from an Antarctic snow pit show the pattern of Pb reaching the Antarctic atmosphere over the last 70 years. Between 1920 and 1950, the Pb concentration shows significant […]
-
Capture and scanning electron microscopy of individual snow crystals
Read more of: Capture and scanning electron microscopy of individual snow crystalsA snow crystal has been successfully collected on to a scanning electron microscope (SEM) stub in central Greenland. It was preserved at liquid-nitrogen temperature for 5 months, prior to examination […]