A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests

Filename: helpers/my_audit_helper.php

Line Number: 143

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3098
Function: getPubMedXML

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Attempt to read property "Count" on bool

Filename: helpers/my_audit_helper.php

Line Number: 3100

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3100
Function: _error_handler

File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

[Effects of hydrodynamic process on bio-optical properties in algal-dominated lake region of shallow lake]. | LitMetric

AI Article Synopsis

  • An in situ study was conducted in Meiliang Bay, Lake Taihu, from July 24 to August 1, 2010, measuring underwater light and various water properties to understand how wind waves affect bio-optical characteristics.
  • The research found that as wind speed increased, the contribution of phytoplankton to light absorption decreased, while contributions from non-phytoplankton increased significantly, showing how wind influences water composition.
  • Additionally, sediment resuspension from wind waves led to an 80% increase in light attenuation and a 42.2% reduction in euphotic depth, highlighting the connection between wind activity and the clarity of water.

Article Abstract

An in situ field high-frequency bio-optical measurement was carried out in the littoral region in Meiliang Bay of Lake Taihu, a large shallow lake of China from 24 July to 1 August in 2010. The underwater irradiance, beam attenuation coefficient and absorption coefficient, the related physical-chemical and meteorological parameters were measured and analyzed, in order to determine the relationship between water bio-optical properties and wind waves process. The absorption coefficients of particles a(p) (440), non-phytoplankton a(d) (440), phytoplankton a(ph) (440) and chromophoric dissolved organic matter (CDOM) a(CDOM) (440) were 3.97, 3.97, 6.58 m(-1); 1.69, 2.17, 4.20 m(-1); 2.28, 1.80, 1.33 m(-1); 1.05, 1.04, 1.08 m(-1) with the corresponding 30-minute average wind speed of <3, 3-5 and >5 m x s(-1) under small, middle and large wind and waves, respectively. Phytoplankton particles contributed the most to total absorption coefficient integrated over a range of photosynthetically active radiation (PAR) (400-700 nm) with a value of 42.5% during small wind waves. With the increase of wind speed, the relative contributions of phytoplankton, CDOM and pure water deceased but the relative contribution of non-phytoplankton significantly increased with the values of 33.0%, 41.7% and 52.0% during small, middle and large wind waves, respectively. A significantly positive linear relationship was found between PAR diffuse attenuation coefficients and the mean wind speed within 10 minutes. Sediment resuspension caused by wind waves had a significant effect on PAR diffuse attenuation coefficient. From small wind waves to large wind waves, PAR diffuse attenuation increased 80.0% but the euphotic depth decreased 42.2%. Significant linear relationships were found between PAR diffuse attenuation coefficient, the beam attenuation coefficients at 750 nm, total suspended solid concentration and wind speed, wave height, wave shear stress, in which the correlation between PAR attenuation coefficients and meteorological hydrology factors was most significant. High-frequency bio-optical measurement showed that hydrodynamic process significantly affected the short-term variation of bio-optical properties in algal-dominated lake region of shallow lake through sediment resuspension, mixing and migration of phytoplankton.

Download full-text PDF

Source

Publication Analysis

Top Keywords

wind waves
28
wind speed
16
par diffuse
16
diffuse attenuation
16
bio-optical properties
12
attenuation coefficient
12
large wind
12
attenuation coefficients
12
wind
11
hydrodynamic process
8

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: