The decrease in diurnal oxygen production in Elodea under the influence of high geomagnetic variability: the role of light, temperature and atmospheric pressure.

The aim of this experiment is to monitor any influence of GMF on oxygen production in a natural exposure environment. This experiment tests a hypothesis that changes in diurnal variability in the geomagnetic field affect diurnal oxygen production in plants. This may be the first study to test this hypothesis, using Elodea, a freshwater plant.
Continuous 24 hour measurements of dissolved oxygen in flasks containing Holtfreiter’s solution and strands of healthy Elodea, were recorded from May 1996, until September 1998, in an electromagnetically quiet, purpose built, garden shed environment, without mains electricity. The coordinates of this site were Latitude 50 degrees 59 minutes N, 0 degrees 7 minutes 56 seconds E (South East UK). Sensormeter recordings of oxygen, light, temperature and air pressure, were uploaded weekly to a PC. The hourly total geomagnetic field measurements were obtained from the nearest observatory. A Clarke type oxygen electrode was used for monitoring dissolved oxygen.
The file xls.1 contains raw data used in cross correlation analysis for figures 3a, 3b and 3c. This involves hourly and sub-hourly data for 21 days in 1997 and 1998 of high geomagnetic field activity and 21 days of low geomagnetic field activity, and containing dates and hourly diurnal times . It shows the %oxygen, loglight and gmf readings.
The file xls.2 contains data from 1997, showing all parameters monitored, and containing the dates for the diurnal monitoring used in the analyses for days of high, medium and low geomagnetic field activity throughout 1997. The data contains the mean diurnal standard deviations for the gmf, and the specific diurnal oxygen calculations (total diurnal % oxygen divided by total light (loglux) and dry plant mass), mean diurnal atmospheric pressure in millibar, mean temperature, lag in hours between peak light and peak oxygen, and relative moon phase.

本实验旨在监测地磁场地磁场（Geomagnetic Field, GMF）对自然暴露环境中植物产氧过程的影响。本实验验证的假说为：地磁场所呈现的日变化波动，会影响植物的产氧日变化规律。本研究或许是首次以淡水植物黑藻（Elodea）为实验材料验证该假说。
1996年5月至1998年9月期间，研究人员在电磁环境安静、专为实验搭建且未接入市电的花园棚屋中，对装有霍尔特弗莱德溶液（Holtfreiter’s solution）与健康黑藻株系的烧瓶开展了连续24小时溶解氧监测。该实验场地的坐标为北纬50°59′、东经0°7′56″（英国东南部）。研究人员每周将溶解氧、光照、温度与气压的传感器读数上传至个人电脑。每小时的总地磁场地磁场数据取自距离最近的地磁观测台。本实验采用克拉克型氧电极（Clarke type oxygen electrode）监测溶解氧浓度。
文件xls.1包含用于图3a、3b与3c交叉相关分析的原始数据，涵盖1997年与1998年中21个高地磁活动日、21个低地磁活动日的逐小时及亚逐小时数据，包含日期与逐小时日时段信息，记录了氧气占比、光照对数与地磁场地磁场读数。
文件xls.2包含1997年的全参数监测数据，涵盖1997年全年高、中、低地磁活动日的日变化分析所用全部监测参数，具体包括：地磁场地磁场的日平均标准差、特定日产氧计算结果（日总氧气占比除以日总光照对数与植物干重的乘积）、以毫巴为单位的日平均大气压、日平均温度、光照峰值与产氧峰值之间的小时延迟数，以及相对月相。