这里有两个简单却能唤起您回忆的短语。翼下吊舱。无人机。心动吗？至少我们是这样的。6 月下旬，日本宇宙航空研究开发机构 （JAXA） 与位于加利福尼亚州帕萨迪纳市的美国国家航空航天局 （NASA） 下属的喷气推进实验室 （JPL） 合作展开了 Railroad Valley 替代标定活动。作为该活动的一部分，来自 NASA 艾姆斯研究中心的一组顶级科学家部署了三台 Picarro 分析仪。其中一台部署在一架阿尔法喷气机的翼下吊舱中，飞上了 25000 英尺的高空。还有一台部署在一架无人机的鼻锥体上。第三台在地面上的帐篷里。这次演习令人印象深刻，我们从中采集到了一些数据。这张照片上是 NASA 有效载荷集成工程师Richard Kolyer（左）在 NASA 艾姆斯研究中心的飞机库里向 Picarro 研发总监Chris Rella（右）展示无人机设备。此外，我想补充的是，…
Prior to Picarro, I was on the academic path. I completed my PhD under the supervision of a brilliant scientist, then scored a post-doc position with a highly regarded researcher doing cutting-edge work that gained attention from the press (and also happened to be in Hawaii). But I rapidly discovered that I was not too gaga about the academic life. The grant writing process and being…
It's commonly said here at Picarro that our customers have more interesting lives than we do -- we're always receiving fantastic photos of someone with one of our instruments in some remote and often idyllic field location. We thought it would be fun to periodically share some of the amazing locations where our customers are doing field work. Here are the five that we've come up with this…
One thing I probably do a little too much of in this job is travel. While it can be a hassle, you do get to see a lot of places, meet a lot of interesting people and grow on both personal and professional levels. And like all matters in life, there are the little things that bring a smile to your face; learning cultural stereotypes are indeed expressed through national train operations;…
大气中的二氧化碳（CO2）和甲烷（CH4）包括各种天然和人为来源，对全球变暖产生了巨大影响。在空间和时间上了解这些排放量的大小和分布对于评估当前和未来的气候影响至关重要。通常使用两种痕量分子来研究各种来源（和输入）的相对重要性：CH4 中的 d13C 和 CO2 中的 d13C。尽管每种排放源类型的范围相当宽并且可以彼此重叠，但生物源的甲烷相对于非生物源甲烷具有较轻的同位素比。
在本次网络研讨会重播中，Felix Vogel（LSCE 研究员）和 David Kim-Hak（Picarro 产品经理）将向您介绍如何使用一流的…
Picarro G2210-i 同位素分析仪专为满足科学界实施实时甲烷排放源归属的需求而设计。高精度测量大气中甲烷和乙烷的功能与二氧化碳和水汽测量相结合，为用户提供一种用来测量并确定垃圾填埋场、压裂站和废弃油气井等甲烷排放源的独特工具。
Picarro G2210-i…
如果你听到 Picarro 的任何人谈论关于全球碳、水和氮循环的全新见解 - “这事实上是地球上所有生命的基石” - 我们指的是 Picarro 的CRDS 技术提供的关于构成这些生命循环的分子的信息 - 尤其是它们的稳定同位素特征。
同位素是同一化学元素的两种或多种原子之一，其原子具有相同数目的质子（即相同的原子序数），在核中具有不同数量的中子（不同的原子量）。稳定的同位素是不具有放射性的化学同位素 - 也就是说，它们不随时间自然衰变…
Picarro has developed a field-deployable, real time, ambient gas monitor capable of measuring atmospheric levels of carbon dioxide, methane, hydrogen sulfide, and ammonia with parts-per-billion (ppbv) sensitivity and water vapor with parts-per-million (ppmv) sensitivity. Results from field trials of three different CO2 analyzers at Harvard, Penn State, and the NOAA facility in Boulder CO…
Description of field-deployable instrumentation that measures carbon dioxide, methane, and water vapor with both high-accuracy and high-precision would reduce the uncertainty in the determination of terrestrial sources and sinks of these dominant greenhouse gases.
Results presented from field trials at Woods Hole Oceanographic Institute and laboratory tests at INSTAAR of a newly available analyzer capable of performing continuous measurements of stable isotopes (δD and δ18O) of liquid water and / or water vapor samples.
Picarro has developed an isotope analyzer for lab and field measurements of carbon isotopes in CO2 with the goal of allowing turnkey analysis to be done without the need for flask samples and complex IRMS methods. Here we present a description of the analyzer and its technology as well as recent results from two different collaborators who utilized the analyzer.
Describing work by CSIRO, CO2 CRC and Picarro to characterize sequestration site leaks using tracers and isotopes.
Describes the first field data taken by Oregon State University of Picarro's dual-species Eddy-Covariance analyzer.
Describes work by INSTAAR, NOAA & Picarro on both liquid water and water vapor measurements of stable water isotopes.
From the EGU 2009 General Assembly, describing measurements of edible oils and chocolates made with Picarro's iTOC-CRDS Isotopic Carbon Analyzer.
Describes specific design aspects of WS-CRDS-based analyzers and how these details result in ultra-stable field measurements.
Describes how CRDS works and shows hydrogen, oxygen and carbon isotope data for water vapor, evapotranspiration, food and agricultural applications.
Describes liquid water and water vapor isotope measurements with the Picarro isotopic water analyzer.
Describes field testing of Picarro's fast analyzer for eddy covariance flux measurements of greenhouse gases.
Describes results of laboratory testing and field campaigns with Picarro's flight-ready greenhouse gas analyzer.
Describes results from a Picarro N2O analyzer based in the mid-infrared spectral region.
Describes a newly-developed analyzer for tracer-based measurements and shows results from field work using such a system.
Describes recent developments in GC-C-CRDS-based instrumentation applied to isotope measurements in large molecules.
Describes the flexibility of Picarro's fast water isotope analyzer for applications requiring very short sample-to-sample measurement times and shows data taken in lab and field measurements.
Describes recent developments in CRDS instrumentation in the mid-infrared spectral region for applications using N2O isotopologue and trace concentration measurements.
Describes field work conducted with Picarro water isotope analyzer for both water vapor and liquid water samples.
Describes use and methods for stable isotope-based food adulteration testing using Cavity Ring-Down Spectrometry.
Describes application and function of a the LIAISON, a new Picarro universal interface for high throughput analysis.
While stable isotope techniques have been previously applied to partition evapotranspiration (ET) fluxes in crops, it has only recently become possible to take in situ, long-term, continuous (every 10 seconds) measurements of stable water vapor isotopologues. A Picarro water vapor isotope analyzer (L1115-i) based on cavity ringdown spectroscopy (CRDS) was recently…
The regulation of Earth’s climate and its ability to sustain life are critically linked to water as it exists in all three of its phases (gas, liquid, and solid). Earth’s water cycle, its movement between the hydrosphere, biosphere, and the atmosphere, and how it undergoes phase changes, is incredibly complex. While we continue to gain insight into the water cycle, there remains…
The quantification of fugitive methane emissions from extended sources such as landfills is problematic due to the high temporal variability and spatial heterogeneity of the emission. Additionally, the relationship between the emission rate and the gas concentration at a given location is dependent on the meteorological conditions and local topography, preventing accurate quantification of…
Cavity Ring-Down spectroscopy is becoming a gold standard for atmospheric monitoring. High sensitivity and precision coupled with low drift characteristics ensure optimal operation even in remote field stations or on aircraft and ships. However, current platforms have been limited to two or three species simultaneous observation. Research and development at Picarro have been focused on…
Hydrothermal fluids from two vent sites along the East Scotia Ridge, E2 and E9, were analyzed for their hydrogen and oxygen isotopic values using a Picarro L1115-i CRDS. The fluids display varying salinity, sulfate and hydrogen sulfide content. None of the samples analyzed in this work showed any signs of spectroscopic interference. Isotopic values of the fluids were combined with…
The world’s first continuous flow isotopic TIC/DOC-CRDS measurements are reported here with remarkable achieved precisions. A measurement precision of the isotopic ratio in the range of 0.2 ‰ to 0.4 ‰ was achieved in minutes of measurement time. Such precision readily distinguishes the isotopic DIC and DOC signatures from a set of three different streamwater samples collected from various…
Describes a field campaign wherein a Picarro water isotope analyzer was used to measure isotopes in water vapor over a corn field in China for the purpose of studying evapotranspiration. The Picarro sampled vapor along with a cold trap sampling system and the real-time Picarro data was compared to offline analysis of the trapped vapor.
The recent development of a field deployable water isotope analyzer using CRDS technology was used to directly measure the vapor isotopes in real time and at multiple heights above the crop canopy. This technique was coupled with additional samples gathered using conventional techniques and a new xylem water extracting apparatus developed by the IAEA.
In a paper published by the Integrated Carbon Observation System (ICOS), the drift performance of 47 Picarro analyzers of 3 different generations were compared (Yver Kowket al, Atmos. Meas. Tech. Discuss., 8, 4219–4272, 2015). The results show that methane drift (the minimum of the Allan standard deviation) was much better in first-generation G1000 analyzers.
…High-salinity waters such as Seawater poses an operational and maintenance challenge to the measurements of water stable isotopes via Cavity Ring-Down Spectroscopy. As liquid samples are evaporated in the vaporizer peripheral before being sent to the CRDS analyzer, salt precipitates accumulate in the vaporizer chamber. As a result, the sample-to-sample memory performance degrades over time…
Soil flux chamber measurements are a key tool for determining production and sequestration of direct and indirect greenhouse gases. The Picarro G2508 Cavity Ring-down Spectrometer radically simplifies soil flux analyses by providing simultaneous measurements of five gases: CO2, CH4, N2O, NH3, and H2O, and by ready field deployment. The Picarro Soil Flux Software (SFP) …
With a global warming potential of nearly 300, N2O is a critically important greenhouse gas, contributing about 5 % of the US total GHG emissions. Agriculture soil management practices are the dominant source of anthropogenic N2O emissions, contributing nearly 75 % of US N2O emissions. In urban areas, vehicle tailpipe emissions and waste water treatment plants are…
The necessity for constant monitoring of greenhouse gases (GHGs) is clearly evident now more than ever. Moreover, interpreting and understanding the processes that dictate the production and consumption of these gases will allow for proper management of GHGs in order to mitigate its detrimental climate effects. Presence of oxygen, or lack of it, is the driving force for determining pathways…
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