13356.000m

Ocean and coastal extreme waves (4m), 2009

Environmental Reporting
Licence

Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

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0
Added
16 Oct 2019

This dataset was first added to MfE Data Service on 16 Oct 2019.

ISO 19115/19139 Metadata XML PDF

Metadata
File Identifier
80A2F423-A183-4BC0-8E9A-A43E2572B0B4
Language
eng
Character Set
Character Set Code
utf8
Hierarchy Level
Scope Code
series
Hierarchy Level Name
series
Contact
Responsible Party
Organisation Name
Stats NZ
Contact Info
Contact
Address
Address
Country
Australia
Role
Role Code
pointOfContact
Date Stamp
Date
2019-10-14
Metadata Standard Name
ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata
Metadata Standard Version
1.1
Reference System Info
Reference System
Reference System Identifier
Identifier
Code
4326
Identification Info
Data Identification
Citation
Citation
Title
Ocean and coastal extreme waves (4m), 2009
Date
Date
Date
Abstract
These data estimate the occurence of extreme wave events in coastal and oceanic waters for 2009, particularly for wave events where significant wave height exceeds a threshold of 4 metres and for a period of at least 12 hours. Significant wave height is defined as four times the square root of the variance of sea surface elevation due to wave motion.
Purpose
The data have been commissioned from NIWA in order to quantify the occurrence of extreme wave events in New Zealand on an annual basis. However, it is apparent that NIWA's primary reason for collecting these data is to develop as accurate a picture as possible of what is happening at present with extreme waves. I.e. while it is possible to compare data over time to create a longer-term series of data on extreme waves - data are not completely comparable over time because the resolution of data has increased over time (allowing more and more accuracy of data over time - but reducing long-term comparability).

NIWA has advised that international data maybe available that provides a longer time series of extreme wave events (at lower resolution). Further work is needed to look into this.
Status
Progress Code
completed
Point Of Contact
Responsible Party
Organisation Name
Stats NZ
Contact Info
Contact
Address
Address
Country
New Zealand
Role
Role Code
publisher
Resource Maintenance
Maintenance Information
Maintenance And Update Frequency
Maintenance Frequency Code
asNeeded
Descriptive Keywords
Keywords
Keyword
New Zealand
Type
Keyword Type Code
theme
Thesaurus Name
Citation
Title
ANZLIC Jurisdictions
Date
Edition
Version 2.1
Edition Date
Date
2008-10-29
Identifier
Identifier
Code
http://asdd.ga.gov.au/asdd/profileinfo/anzlic-jurisdic.xml#anzlic-jurisdic
Cited Responsible Party
Responsible Party
Organisation Name
ANZLIC the Spatial Information Council
Role
Role Code
custodian
Descriptive Keywords
Keywords
Keyword
CLIMATE-AND-WEATHER
Keyword
CLIMATE-AND-WEATHER-Meteorology
Keyword
CLIMATE-AND-WEATHER-Extreme-weather-events
Keyword
MARINE-Meteorology
Keyword
MARINE-Coasts
Keyword
OCEANOGRAPHY
Keyword
OCEANOGRAPHY-Physical
Type
Keyword Type Code
theme
Thesaurus Name
Citation
Title
ANZLIC Search Words
Date
Edition
Version 2.1
Edition Date
Date
2008-05-16
Identifier
Identifier
Code
http://asdd.ga.gov.au/asdd/profileinfo/anzlic-theme.xml#anzlic-theme
Cited Responsible Party
Responsible Party
Organisation Name
ANZLIC the Spatial Information Council
Role
Role Code
custodian
Resource Constraints
Security Constraints
Classification
Classification Code
unclassified
Resource Constraints
Legal Constraints
Use Limitation
Creative Commons Attribution 4.0 International
Use Constraints
Restriction Code
license
Spatial Representation Type Code
grid
12
Language
eng
Character Set
Character Set Code
utf8
Topic Category Code
climatologyMeteorologyAtmosphere
Topic Category Code
oceans
Topic Category Code
environment
Extent
EX _ Extent
Geographic Element
EX _ Geographic Bounding Box
143.2617184.6289-54.49219-20.82031
Data Quality Info
DQ _ Data Quality
Scope
DQ _ Scope
Level
Scope Code
series
Level Description
Scope Description
Other
series
Lineage
LI _ Lineage
Statement
This index was generated using NIWA’s operational wave forecasting model NZWAVE-12 (Gorman, 2016). This model has a 12-kilometre resolution and models wave heights. The model was created using:
• wind from NIWA’s NZLAM-12 weather forecast model
• swell from NIWA’s global wave forecast model

We use a duration threshold of 12 hours as it allows semi-diurnal tides to cover their full low water to high water range. This means that there was both a high tide (when overtopping and damage to coastal infrastructure, for example, is most likely) and a low tide during an event.

Gorman, R (2016). Extreme wave indices for New Zealand coastal and oceanic waters. NIWA Client Report HAM2016-014 prepared for the Ministry for the Environment.
Metadata Constraints
Security Constraints
Classification
Classification Code
unclassified