Gases Working Group: Why is it important to study Air-Sea Gas Exchange?

Exchange of trace gases between the oceans and the atmosphere affects the

VIERS-1 scatterometer model

In this paper a description is given of a physically based theoretical ocean backscatter model (called the VIERS-1 model) for intermediate incidence angles, and a comparison of its performance against the CMOD4 empirical model is made. The VIERS-1 scatterometer algorithm is based on a two-scale composite surface model which includes both...

A summary of the VIERS-1 scatterometer model

The VIERS-1 (Verification and Interpretation ERS-1) project has resulted in a new algorithm for the interpretation of the wind scatterometer, based on a physical model of air/sea/radar interaction in which the radar backscatter is calculated from wind and wave conditions. The model is inverted to obtain the wind from the radar backscatter. For...

New Measurements of Eddy Fluxes at the Sea Surface in ASGASEX

On the Discrepancies between CO2 Flux Measurement Methods

In 1993 the ASGASEX (for Air-Sea GAS Exchange) experiment took place at Meetpost Noordwijk, a research platform off the Dutch coast. One of the aims of the project was to try to find an explanation for the order of magnitude difference between transfer velocities for CO2, measured with the eddy correlation technique, and those from other methods...

VIERS-1 Final report phase 4

Measurements of Humidity and Temperature in the Marine Environment during the HEXOS Main Experiment

Accurate measurement of fluctuations in temperature and humidity are needed for determination of the surface evaporation rate and the air-sea sensible heat flux using either the eddy correlation or inertial dissipation method for flux calculations. These measurements are difficult to make over the ocean, and are subject to large errors when...

VIERS-1 Final report phase 4A

VIERS-1 Final report phase 3

Comparison of Microwave Backscatter Measurements and Small-scale Surface Wave Measurements Made from the Dutch Ocean Research Tower "Noordwijk"

To improve the understanding of the interaction between microwaves and water waves the VIERS-l project started in 1986 with the preparation of two wind/wave tank experiments and an ocean tower experiment. In February 1988, combined measurements of microwave backscatter, wind, waves and gas exchange have been carried out in the large Delft...

VIERS-1 progress report part-2: Completion of the laboratory experiments

This report is a sequel to BCRS-89-24: "Progress report on the VIERS-I project, part-1: the Delft experiment", in which the goals of the VIERS-1 project, the programme of activities, and the first laboratory experiment and its preliminary results were presented. In the first part of the present report the definitive results of the Delft...

Comparison of radar backscatter measurements and area extended wave slope measurements of wind generated waves in a large wind/wave tank with two-scale model predictions

Comparison of X-band radar backscatter measurements with area extended wave slope measurements made in a large wind wave tank

Combined measurements of microwave backscatter, wind, waves, and gas exchange have been carried out in the large Delft Hydraulics wind/wave tank. This experiment was the first of a series of experiments in the VIERS-1 project. In this project, a number of Dutch and one German laboratory cooperate to come to a physical description of the process...

First results of the VIERS-1 experiment

In February 1988, cornbined measurements of microwave backscatler, wind, waves and gas exchange have been carried out in the large Delft lHydraulics wind/rwave tank. This experiment was the first in a series of experimeuts in the frame of the VIERS-1 project. In this project a number of Dutch and German laborabories cooperate. Main objective is...

Progress report on the VIERS-1 project, Part 1: The Delft wind/wave experiment: experiment and first results