Report of Ocean Climate Time-Series Workshop

2,84
MB

170
stron

4792
ID United Nations Educational, Scientific and Cultural Organization

1999
rok

TABLE OF CONTENTS

SUMMARY REPORT

PREFACE

1. INTRODUCTION

1.1 A TIME-SERIES DEFINITION

2. RE VI E W AND ADOPTION OF THE AGENDA

3. WORKSHOP PERSPECTIVES

3.1 OBJECTIVES OF THE WORKSHOP

3.2 OCEAN CLIMATE OBSERVATIONS AND UPPER OCEAN SAMPLING ISSUES

3.3 DEEP OCEAN: RELATION TO GRIDDED PRODUCTS

3.4 JGOFS PHILOSOPHY ON TIME-SERIES MEASUREMENTS

3.5 CLIVAR AND OOPC VIEWS AND EXPECTATIONS

3.6 REPORTS OF RECENT EVENTS AND MEETINGS

4. SCIENCE OF SINGLE POINT TIME SERIES 8

4.1 THE BERMUDA ATLANTIC TIME-SERIES STATION (BATS) 8

4.2 THE HAWAII OCEAN TIME-SERIES (HOT) STATION 9

4.3 ESTOC (Estacih de Series Temporales Oceknicas de Canarias) 1 0

4.4 KERFIX 1 0

4.5 WEATHER STATION PAPA (P) 11

4.6 BRAZIL DEEP BASIN EXPERIMENT 11

4.7. SINGLE POINT STATION FINDINGS 1 2

5. APPLICATION AND REPEAT SECTIONS

5.1 METEOROLOGICAL TIME-SERIES MEASUREMENTS

5.2 TROPICAL PACIFIC TAO ARRAY

5.3 INTERANNUAL VARIABILITY IN THE LABRADOR SEA

5.4 NORWEGIAN STATION MIKE (M)

5.5 NORTH ATLANTIC REPEAT SECTIONS

5.6 NORTH PACIFIC REPEAT SECTIONS

5.7 THE XBT/XCTD NETWORK AND THE TASMAN BOX

5.8 SESSION FINDINGS

6.1 ASSIMILATION OF TIME-SERIES OBSERVATIONS IN NUMERICAL MODELS

6.2 CLIVAR NORTH PACIFIC CLIMATE STUDY

6.3 CLIVAR UPPER OCEAN PANEL/ SURFACE FLUXES

6.4 OCEAN PCO, AND CARBON MONITORING

6.5 JGOFS FOLLOW-ON

6.6 LONG TERM MEASUREMENTS IN THE SOUTHERN OCEAN RECOMMENDED ATTRIBUTES

FOR TIME-SERIES STATIONS

7.1 CATEGORIES OF STATIONS

7.2 ATTRIBUTES

7.3. OCEAN STATION BRAVO ASSESSMENT

7.4. OCEAN STATION KERFIX ASSESSMENT ROLE OF TIME SERIES AND REPEAT SECTIONS

IN DESCRIBING CHANGES IN OCEANIC STORAGE OF HEAT, FRESH WATER AND CARBON

VARIABILITY IN LABRADOR SEA WATER (LSW) AT BRAVO

MERIDIONAL TRANSPORTS OF HEAT AND

FRESH WATER IN THE NORTH ATLANTIC

SHALLOW OVERTURNING CIRCULATION OF

THE NORTH PACIFIC

DEEP AND BOTTOM WATER TRANSPORT CHANGES

AS INDICATORS IN SOURCE REGIONS

INDOPACIFIC THROUGHFLOW

BERING STRAIT INFLOW

INDIAN OCEAN EXPORT OF LOW-SALINE WATERS

TO THE SOUTH ATLANTIC

OTHER POTENTIAL APPLICATIONS

9 . THE ROLE OF OCEAN TIME SERIES FOR CLIMATE MODELLING

9.1 CLIMATE MODELLING ACTIVITIES AND OCEAN OBSERVATIONAL CONSIDERATIONS

9.1.1 Testing and Improving Climate Models with Ocean Data

9.1.2 Forcing Ocean Climate Models

9.1.3 Use of Models to Combine and Interpret Ocean Observations 29

9.1.4 Basic Ocean Observing System Design Considerations 29

9.1.5 Climate Analysis/Assessment 30

9.1.6 Climate Prediction 30

9.2.1 Research Versus Applications Objectives 31

9.2.2 Optimizing System Design 31

OCEAN CLIMATE MODELLING REQUIREMENTS 31

9.3.1 Testing and Improving Climate Models with Ocean Data 31

9.3.2 Forcing Ocean Climate Models 32

9.3.3 Use of Models to Combine and Interpret Ocean Observations 33

9.3.4 Ocean Observing System Design 34

9.3.5 Climate Analysis/Assessment 34

9.3.6 Climate Prediction 34

CONCLUSIONS REGARDING TIME-SERIES OBSERVATIONS FOR MODELLING 34

RECOMMENDATIONS REGARDING TIME-SERIES FOR MODELLING 34

10. PERSPECTIVES ON HISTORICAL AND FUTURE TIME-SERIES 3 5

10.1 RECOMMENDATIONS 36

11. GENERAL FINDINGS AND CONCLUSIONS 37

ANNEXES

Agenda

List of Participants

Organizing Committee for the Workshop

Some Sampling Issues for OOPC

Contribution of Existing Time Series to Analysis of Large Scale Ocean Variability

Biogeochemical Studies at the Hawaii Ocean Time- Series (HOT) Station Aloha

ESTOC Station

KERFIX

Line P and Station P Time Series

Meteorological Time-Series Measurements

TAO Array: History, Present, Prospects

Causes and Consequences of Interannual Variability in the Labrador Sea

Ocean Weather Ship Station M

Deacadal Changes in the Meridional Overturning Circulation of the North Atlantic:

A First Glimpse at 40 Years of Trans-oceanic Sections Since the IGY

Japanese North Pacific Repeat Sections

Repeat XBTXCTD Sections in the Pacific

Assimilation of Time-Series Observations in Models

XVIII. Overview of CLIVAR Upper Ocean Long-Term Observations

XIX. Some Remarks Regarding Long-Term In Situ Measurements in the Southern Ocean

xx. Long-Term Hydrographic Variations Observed in the Hawaii Ocean Time Series

XXI. Notes from John Toole on Oceanographic Time-Series Stations within CLIVAR

XXII. Proposal for a North Pacific Basin-Wide Extended Climate Study

XII. Causes and Consequences of Interannual Variability in the Labrador Sea

XIII. Ocean Weather Ship Station M

XIV. Deacadal Changes in the Meridional Overturning Circulation of the North Atlantic: A First

Glimpse at 40 Years of Trans-oceanic Sections Since the IGY

xv. Japanese North Pacific Repeat Sections

XVI. Repeat XBT/XCTD Sections in the Pacific

XVII. Assimilation of Time-Series Observations in Models

XVIII. Overview of CLIVAR Upper Ocean Long-Term Observations

XIX. Some Remarks Regarding Long-Term In Situ Measurements in the Southern Ocean

xx. Long-Term Hydrographic Variations Observed in the Hawaii Ocean Time Series

XXI. Notes from John Toole on Oceanographic Time-Series Stations within CLIVAR

XXII. Proposal for a North Pacific Basin-Wide Extended Climate Study