Data Package Metadata View Summary

Lake Tahoe Historic Secchi depth

General Information

Data Package:

Local Identifier:

edi.1340.3

Title:

Lake Tahoe Historic Secchi depth

Alternate Identifier:

DOI PLACE HOLDER

Abstract:

Historic Secchi depth (Water clarity) measurement of Lake Tahoe, CA/NV. There are two sampling stations Index (LTP, 39.0972 -120.155) and Mid-lake (MLTP, 39.1417 -120.0153). Observation at Index station started on 1967-07-28, and averaged sampling interval is around 14 days. Mid-lake station sampling has been started on 1980-04-29, and taken at approximately 33 days interval.

See methods for details.

Publication Date:

2023-03-30

For more information:
Visit:	DOI PLACE HOLDER

Time Period

Begin:

1967-07-28

End:

2021-09-02

Time Period

Begin:

1980-04-29

End:

2021-09-01

People and Organizations
Contact:	Watanabe, Shohei (Tahoe Environmental Research Center, University of California, Davis, Associate Project Scientist) [ email ]
Contact:	Schladow, Geoffrey (Tahoe Environmental Research Center, University of California, Davis, Director) [ email ]
Creator:	Watanabe, Shohei (Tahoe Environmental Research Center, University of California, Davis, Associate Project Scientist)
Creator:	Schladow, Geoffrey (Tahoe Environmental Research Center, University of California, Davis, Director)

Data Entities
Data Table Name:	Lake_Tahoe_Secchi_LTP
Description:	Secchi depth measurement at Index station (LTP) of Lake Tahoe
Data Table Name:	Lake_Tahoe_Secchi_MLTP
Description:	Secchi depth measurement at Mid-lake station (MLTP) of Lake Tahoe

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/1340/3/5e02810b778019357a6e7b17b084dc11
Name:	Lake_Tahoe_Secchi_LTP
Description:	Secchi depth measurement at Index station (LTP) of Lake Tahoe
Number of Records:	1565
Number of Columns:	6

Table Structure

Object Name:

Secchi_LTP.csv

Size:

188265 byte

Authentication:

0abc70113aad3ce9cdc2a1a5b8c4e87c Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Date_Time_Local

Secchi

Secchi_Disappear

Secchi_Reappear

Viewing_Condition

Lake_Condition

Column Name:

Date_Time_Local

Secchi

Secchi_Disappear

Secchi_Reappear

Viewing_Condition

Lake_Condition

Definition:

Measured date and time in local time (PST/PDT)

Secchi depth in m. Average of Col 3 and Col 4.

Depth where the disk disappear when lowering from observer's view in m.

Depth where the disk re-appear when recovering in m.

Subjective measure of viewing condition

Subjective description of general weather and lake condition at the time of Secchi measurement

Storage Type:

dateTime

float

string

Measurement Type:

dateTime

ratio

nominal

Measurement Values Domain:

Format	YYYY-MM-DD hh:mm:ss
Precision

Unit	meter
Type	real

Unit	meter
Type	real

Unit	meter
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No viewing condition available
Source

Code Definition

Code	1
Definition	Poor
Source

Code Definition

Code	2
Definition	Poor-to-fair
Source

Code Definition

Code	3
Definition	Fair
Source

Code Definition

Code	4
Definition	Fair-to-good
Source

Code Definition

Code	5
Definition	Good
Source

Code Definition

Code	6
Definition	Good-to-Excellent
Source

Code Definition

Code	7
Definition	Excellent
Source

Definition

text

Missing Value Code:

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/1340/3/82c38ae6e5764be03732dbfae82a1c64
Name:	Lake_Tahoe_Secchi_MLTP
Description:	Secchi depth measurement at Mid-lake station (MLTP) of Lake Tahoe
Number of Records:	540
Number of Columns:	6

Table Structure

Object Name:

Secchi_MLTP.csv

Size:

73282 byte

Authentication:

d4e861fee8834296a7df9fbbcb160238 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Date_Time_Local

Secchi

Secchi_Disappear

Secchi_Reappear

Viewing_Condition

Lake_Condition

Column Name:

Date_Time_Local

Secchi

Secchi_Disappear

Secchi_Reappear

Viewing_Condition

Lake_Condition

Definition:

Measured date and time in local time (PST/PDT)

Secchi depth in m. Average of Col 3 and Col 4.

Depth where the disk disappear when lowering from observer's view in m.

Depth where the disk re-appear when recovering in m.

Subjective measure of viewing condition

Subjective description of general weather and lake condition at the time of Secchi measurement

Storage Type:

dateTime

float

string

Measurement Type:

dateTime

ratio

nominal

Measurement Values Domain:

Format	YYYY-MM-DD hh:mm:ss
Precision

Unit	meter
Type	real

Unit	meter
Type	real

Unit	meter
Type	real

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	No viewing condition available
Source

Code Definition

Code	1
Definition	Poor
Source

Code Definition

Code	2
Definition	Poor-to-fair
Source

Code Definition

Code	3
Definition	Fair
Source

Code Definition

Code	4
Definition	Fair-to-good
Source

Code Definition

Code	5
Definition	Good
Source

Code Definition

Code	6
Definition	Good-to-Excellent
Source

Code Definition

Code	7
Definition	Excellent
Source

Definition

text

Missing Value Code:

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
(No thesaurus)	Lake Clarity, Lake Tahoe, Limnology, long-term observations, Secchi depth

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

The 25cm (10 inch) matte white disk is lowered from shaded side of the boat. The depth where disk disappear when lowering and re-appear when recovering are recorded and then averaged. Also, subjective measure of viewing condition by the observer (explained below) and also observation of general weather and lake conditions are recorded.

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@edirepository.org

Web Address:

https://edirepository.org

Id:

https://ror.org/0330j0z60

Creators:

Individual:

Shohei Watanabe

Organization:

Tahoe Environmental Research Center, University of California, Davis

Position:

Associate Project Scientist

Address:

291 Country Club Dr.,

Incline Village, NV 89451

Email Address:

swatanabe@ucdavis.edu

Id:

https://orcid.org/0000-0003-2026-6263

Individual:

Geoffrey Schladow

Organization:

Tahoe Environmental Research Center, University of California, Davis

Position:

Director

Address:

291 Country Club Dr.,

Incline Village, NV 89451

Email Address:

gschladow@ucdavis.edu

Id:

https://orcid.org/0000-0003-4205-1001

Contacts:

Individual:

Shohei Watanabe

Organization:

Tahoe Environmental Research Center, University of California, Davis

Position:

Associate Project Scientist

Address:

291 Country Club Dr.,

Incline Village, NV

Email Address:

swatanabe@ucdavis.edu

Id:

https://orcid.org/0000-0003-2026-6263

Individual:

Geoffrey Schladow

Organization:

Tahoe Environmental Research Center, University of California, Davis

Position:

Director

Address:

291 Country Club Dr. ,

Incline Village, NV

Email Address:

gschladow@ucdavis.edu

Id:

https://orcid.org/0000-0003-4205-1001

Metadata Providers:

Individual:

Shohei Watanabe

Organization:

Tahoe Environmental Research Center, University of California, Davis

Position:

Associate Project Scientist

Address:

291 Country Club Dr.,

Incline Village, NV

Email Address:

swatanabe@ucdavis.edu

Id:

https://orcid.org/0000-0003-2026-6263

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

1967-07-28

End:

2021-09-02

Time Period

Begin:

1980-04-29

End:

2021-09-01

Sampling Site:

Description:

Index station (LTP) at Lake Tahoe is located at north west of the lake with 165m deep of water.

Site Coordinates:

Longitude (degree):

-120.155

Latitude (degree):

39.0972

Sampling Site:

Description:

Index station (LTP) at Lake Tahoe is located at center of the lake with 450m deep of water.

Site Coordinates:

Longitude (degree):

-120.0153

Latitude (degree):

39.1417

Project

Parent Project Information:

Title:

Lake Tahoe long term limnological monitoring

Personnel:

Individual:

Geoffrey Schladow

Organization:

Tahoe Environmental Research Center, University of California, Davis

Position:

Director

Email Address:

gschladow@ucdavis.edu

Id:

https://orcid.org/0000-0003-4205-1001

Role:

Director of the research institute

Individual:

Shohei watanabe

Organization:

Tahoe Environmental Research Center, University of California, Davis

Position:

Associate Project Scientist

Email Address:

swatanabe@ucdavis.edu

Id:

https://orcid.org/0000-0003-2026-6263

Role:

Data management

Additional Award Information:

Funder:	Tahoe Regional Planning Agency (TRPA)
Title:	Pelagic monitoring of Lake Tahoe

Additional Award Information:

Funder:	Tahoe Environmental Research Center, University of California, Davis
Title:	Pelagic monitoring of Lake Tahoe

Maintenance

Maintenance:

Description:	The data set will be updated quarterly, approximately in Feb, May, Aug, Nov of each year.
Frequency:	otherMaintenancePeriod

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'emlEditor'
        |     |        \___attribute 'app' = 'ezEML'
        |     |        \___attribute 'release' = '2023.02.19'
        |     |___text '\n    '
        |___text '\n  '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

Data Package Metadata View Summary

Lake Tahoe Historic Secchi depth

Data Entities

Data Table

Data Table

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Lake Tahoe Historic Secchi depth

+/- Data Entities

Data Table

Data Table

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata