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7                                     Unleashing the potential of the Internet of Things

            3.1.2   greenhouse gas [b-ISO 14064-1]: Gaseous constituent of the atmosphere, both natural and
            anthropogenic,  that  absorbs  and  emits  radiation  at  specific  wavelengths  within  the  spectrum  of
            infrared radiation emitted by the Earth's surface, the atmosphere and clouds.

            3.1.3   sensor [ITU-T Y.2221]: An electronic device that senses a physical condition or chemical
            compound and delivers an electronic signal proportional to the observed characteristic.
            3.1.4   sensor  network  [ITU-T  Y.2221]:  A  network  comprised  of  interconnected  sensor  nodes
            exchanging sensed data by wired or wireless communication.
            3.1.5   sensor  node  [ITU-T  Y.2221]:  A  device  consisting  of  sensor(s)  and  optional  actuator(s)
            with capabilities of sensed data processing and networking.

            3.1.6   ubiquitous  sensor  network  [ITU-T  Y.2221]:  A  conceptual  network  built  over  existing
            physical  networks  which  make  use  of  sensed  data  and  provide  knowledge  services  to  anyone,
            anywhere and at any time, and where the information is generated by using context awareness.

            3.1.7   USN middleware [ITU-T Y.2221]: A set of logical functions to support USN applications
            and services.

            3.2     Terms defined in this Recommendation

            None.


            4       Abbreviations and acronyms
            This Recommendation uses the following abbreviations and acronyms:

            API           Application Program Interface
            CPU           Central Processing Unit

            GAW           Global Atmosphere Watch
            GHG           Greenhouse Gas

            IPCC          Intergovernmental Panel on Climate Change
            RX            Receiver

            TX            Transmitter
            UNFCCC        United Nations Framework Convention on Climate Change

            USN           Ubiquitous Sensor Network


            5       Conventions
            None.


            6       Overview of climate change monitoring

            6.1     Global greenhouse gas monitoring network

            Monitoring greenhouse gas (GHG) emissions as well as climate change requires that GHG sensors,
            sensor  nodes  and  sensor  networks  are  installed  nationally  and/or  globally.  A  nationwide  GHG
            monitoring network may interwork with a global GHG monitoring network, for example, the one
            illustrated in Figure 1, which is maintained by the Global Atmosphere Watch (GAW) programme of
            the World Meteorological Organization (WMO) [b-GAW programme].







            930      Rec. ITU-T Y.4700/F.747.2 (06/2012)
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