A multi‐layer, closed‐loop system for continuous measurement of soil CO <sub xmlns='http://www.wiley.com/namespaces/wiley'>2</sub>2 concentration

Jochheim Hubert; Wirth Stephan; von Unold Georg

摘要

Abstract > We present a setup of measurement devices that allow the continuous measurement of CO <sub>2</sub> concentrations at different soil depths using small nondispersive infrared (NDIR) sensors within a 16‐channel closed‐loop system. Hydrophobic, gas‐permeable polypropylene membrane tubes allow an equilibrium of CO <sub>2</sub> concentration of circulating air, driven by peristaltic pumps, with soil air. The advantage of this system over other systems is the option to measure up to 16 channels without a time shift between individual measurements, as occurs when using a multiplexer system. Furthermore, the system prevents carry‐over effects. A 16‐position multiplexer provides a connection to an isotopic CO <sub>2</sub> analyzer for measurement campaigns. This approach aimed to detect vertical concentration profiles and temporal variation of soil CO <sub>2</sub> concentration and δ 13 C‐CO <sub>2</sub> signature in soils and to determine the impact of underlying environmental drivers based on concurrent measurements of soil temperature and moisture. The system was tested by applying it in a beech and a pine forest stand during a period of 15 d. Soil CO <sub>2</sub> concentrations were mostly determined by soil temperature as well as by soil moisture at a biweekly scale. At diel scale, the dynamic of soil CO <sub>2</sub> concentrations followed the shape of soil temperature, sometimes with some time shift. The observed values of δ 13 C‐CO <sub>2</sub> at 10–30 cm soil depths ranged between –22.0 and –19.0‰ at the beech site and –22.4 and –21.8‰ at the pine site, with a distinct vertical gradient at the beech site. Ou </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract XMLNS =“http://www.wiley.com/namespaces/wiley”type =“main”xml：lang =“en”> <title type =“main”>抽象</ title> >我们存在在16通道闭环系统内使用小型非分散红外线（NDIR）传感器，允许在不同土壤深度的CO <SUB> 2 </ sub>浓度的连续测量的测量装置的设置。疏水性，透气聚丙烯膜管允许由蠕动泵驱动的CO <Sub> 2 </ Sub>浓度的循环空气平衡，具有土壤空气。该系统在其他系统上的优点是在使用多路复用器系统时，在单个测量之间的时间偏移时测量多达16个通道的选项。此外，系统防止随身携带效果。 16位多路复用器提供与同位素CO <SUB> 2 </ sub>分析器的连接，用于测量运动。这种方法旨在检测垂直浓度分布和土壤CO <sub> 2 </ sub>浓度的时间变化和δ 13 / sup> c-co <sub> 2 </ sub>签名，并确定基于对土壤温度和水分的同步测量的基础环境驱动因素对潜在环境司机的影响。通过在15天的时间内将其施加在山毛榉和松树林站中来测试该系统。土壤CO <sub> 2 </ sub>浓度主要通过土壤温度以及每次鳞片的土壤水分确定。在Diel Scale时，土壤Co <sub> 2 </ sub>浓度的动态遵循土壤温度的形状，有时有一段时间转移。观察到的δ 13 / sup> c-co <sub> 2 </ sub>在10-30cm的土壤深度之间，在Beech遗址的-22.0和-19.0‰之间，-22.4和-21.8‰在松树网站上，在山毛榉网站上具有独特的垂直梯度。 ou.. </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-35667/'>《Journal of plant nutrition and soil science》</a> <b style="margin: 0 2px;">|</b><span>2018年第1期</span><b style="margin: 0 2px;">|</b><span>共8页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Jochheim Hubert&option=202" target="_blank" rel="nofollow">Jochheim Hubert;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wirth Stephan&option=202" target="_blank" rel="nofollow">Wirth Stephan;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=von Unold Georg&option=202" target="_blank" rel="nofollow">von Unold Georg;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Institute of Landscape Systems AnalysisLeibniz Centre for Agricultural Landscape Research (ZALF)Eberswalder Str. 84 15374 Müncheberg Germany;</p> <p>Institute of Landscape BiogeochemistryLeibniz Centre for Agricultural Landscape Research (ZALF)Eberswalder Str. 84 15374 Müncheberg Germany;</p> <p>METER GroupMettlacher Stra?e 8 81379 München Germany;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/212.html" title="农业基础科学">农业基础科学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=beech&option=203" rel="nofollow">beech;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=δ 13 C&option=203" rel="nofollow">δ 13 C;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=flux‐gradient approach&option=203" rel="nofollow">flux‐gradient approach;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=isotopic signature&option=203" rel="nofollow">isotopic signature;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=pine&option=203" rel="nofollow">pine;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=soil respiration&option=203" rel="nofollow">soil respiration;</a> </p> <div class="translation"> 机译：山毛榉;δ13c;助焊剂渐变方法;同位素签名;松木;土壤呼吸; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704025819470.html">A multi‐layer, closed‐loop system for continuous measurement of soil CO <sub xmlns="http://www.wiley.com/namespaces/wiley">2</sub>2 concentration</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Jochheim Hubert&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Jochheim Hubert,</a> <a 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class="enjiyixqcontent" href="/patent-detail/06120204472994.html">一种闭环系统制氧机及其流量/浓度调节闭环控制系统</a> <b>[P]</b> . <span> 中国专利： CN204474325U </span> <span> . 2015-07-15</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130458970189.html">Process to minimize the error of acceleration in a closed loop control system, apparatus for controlling the movement of a system of machine.Apparatus for cutting individual segments of a continuous strip of film, apparatus for cutting individual pieces of a continuous strip.The circuit integrator to employment in a feedback loop to control the movement, and apparatus for feeding a continuous strip</a> <b>[P]</b> . <span> 外国专利：  BR9402418A </span> <span> . 1995-03-14</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：使闭环控制系统中的加速度误差最小化的方法，用于控制机器系统运动的设备，用于切割连续胶片条的单个段的设备，用于切割连续条胶片的单个设备的电路积分器在反馈回路中使用以控制运动，以及用于送入连续带材的设备 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130435010368.html">PROBE, MEASUREMENT SYSTEM AND METHOD FOR MEASURING CONCENTRATIONS OF GASEOUS COMPONENTS OF SOIL AIR, AND RATES OF GAS TRANSPORT IN SOIL</a> <b>[P]</b> . <span> 外国专利：  CA2507354A1 </span> <span> . 2006-11-18</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：用于测量土壤空气中气态成分浓度和土壤中气体传输速率的探针，测量系统和方法 </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/patent-detail/06130420364793.html">Construction where the system includes Connection supports in the shape of a closed loop Continuous each: two first portions of the lining and Anchor Alternating with the first portions toAlong the way of closed loopTwo second portions which extend towards the posterior part of the coating which are bent to form Two loops in the Pass Band of Reinforcement; method.</a> <b>[P]</b> . <span> 外国专利：  CL2012002643A1 </span> <span> . 2013-01-25</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：系统包括闭环形状的连接支撑的结构连续的每个：衬里的两个第一部分和锚定点与第一部分交替以沿着闭环的方式向着涂层的后部延伸的两个第二部分弯曲在加固通带中形成两个回路;方法。 </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img cardcommon clearfix" style="margin-bottom: 10px;display:none;" > </div> </div> </div> <div id="thesis_get_original1" class="downloadBth" style="bottom: 19px;z-index: 999;" onclick="ywcd('0704025819470','4',7,2,1,'',this,24)" class="delivery" prompt="010401" 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A multi‐layer, closed‐loop system for continuous measurement of soil CO 22 concentration

摘要

A multi‐layer, closed‐loop system for continuous measurement of soil CO ₂2 concentration