The climate of Iowa: soil temperatures at Ames

The soil temperature observations summarized in this publication have been made possible through the cooperation of Iowa State University, the Iowa Department of Agriculture and the Weather Bureau, United States Department of Commerce. These observations constitute the only soil temperature record in Iowa of any appreciable length. Soil temperature measurements, however, have recently been initiated at Saratoga, Spencer, Council Bluffs and Burlington and are published currently by the United States Weather Bureau in the Climatological Data of Iowa (7).https://lib.dr.iastate.edu/specialreports/1021/thumbnail.jp

Our Usual Weather

This is the eighth and last in a series of articles on our weather to appear in Iowa Farm Science. This article deals with our usual weather in the state- the kinds which are typical of a location or season

Clouds - The Signposts of the Sky

To a camera enthusiast a good cloud can really make a picture. To the pilor of a plane, a cloud may be something to avoid. For those interested in the weather, to know your clouds is to know much about weather forecasting

The Air We Live In

The Earth is surrounded by a gaseous envelope which we call the atmosphere. This atmosphere extends over our heads for about 1,000 miles- becoming thinner and thinner and finally merging into interplanetary space

Why Our Weather Changes

The weather we have is caused by an interplay of a large number of different properties of the atmosphere. As the atmosphere moves, these properties change, and this makes the weather change at a particular location

Iowa Weather Patterns

Iowa is the crossroads of many air masses, fronts and pressure areas. These combine to give the state its ever-changing weather

What is Weather?

We live at the bottom of a vast sea of air hundreds of miles deep. Without this air or atmosphere, neither animals nor plants could exist. There would be no wind, no clouds, no rain, no fire. In short, weather- and life as we know it- would not exist

How Weather Forecasts Are Made

We\u27ve been looking in previous articles in this series some of the factors that cause weather to behave as it does. Now let\u27s see how a weather forecast is made. We\u27ll look in briefly on the operations of the United States Weather Bureau - the government\u27s official weather agency

How You and I Record the Weather

When you can measure what you are speaking about and express it in numbers, you know something about it, but when you cannot express it in numbers, your knowledge is of a meager, unsatisfactory kind

A scanning drift tube apparatus for spatio-temporal mapping of electron swarms

A "scanning" drift tube apparatus, capable of mapping of the spatio-temporal evolution of electron swarms, developing between two plane electrodes under the effect of a homogeneous electric field, is presented. The electron swarms are initiated by photoelectron pulses and the temporal distributions of the electron flux are recorded while the electrode gap length (at a fixed electric field strength) is varied. Operation of the system is tested and verified with argon gas, the measured data are used for the evaluation of the electron bulk drift velocity. The experimental results for the space-time maps of the electron swarms - presented here for the first time - also allow clear observation of deviations from hydrodynamic transport. The swarm maps are also reproduced by particle simulations