B. Interaction with other synoptic features such as a shear lines or baroclinic zones. AMSU Tropical Cyclone Page (see the link on the Tropical Hot List) Cold or Warm Core? can assist in ascertaining whether a system contains a warm core. Examine the channel 7 (200 mb) and 8 (100 mb) data for a warm core of brightness temperatures in the vicinity of the center as in the images below for Cyclone Nargis (2008). In major hurricanes and typhoons, the warm core will be well defined and tight in both channels as in the images below for Supertyphoon Rammasun (2008). As extratropical transition occurs, the warm core is disrupted at 100 mb (Ch. 8) followed by 200 mb (Ch. 7) as exhibited in the images below of Rammasun (2008) as it underwent extratropical transition. At this point the analyst should classify the system as extratropical.” “becoming According to Roger Edson, loss of deep ice convection (seen in the 85 GHz) near the TC center and expansion of the winds away from the center and into a horseshoe-like appearance are some of the characteristics of extratropical transition in the microwave and scatterometer data (Fig. Figure 3-1 showing signals of extratropical transition in QSCAT (above) and MW imagery (below). 4. The Classification Process 4.3 Analysis Techniques 4.3.1 Determining Position The purpose of this section is not to on conventional infrared (IR) and visible (VIS) geostationary satellite data, but rather to draw attention to ancillary satellite data and other techniques that can aid the analyst in determining the center location of a tropical cyclone.
B. Interaction with other synoptic features such as a shear lines or baroclinic zones. AMSU Tropical Cyclone Page (see the Cold or Warm Core? link on the Tropical Hot List) can assist in ascertaining whether a system contains a warm core. Examine the channel 7 (200 mb) and 8 (100 mb) data for a warm core of brightness temperatures in the vicinity of the center as in the images below for Cyclone Nargis (2008). In major hurricanes and typhoons, the warm core will be well defined and tight in both channels as in the images below for Supertyphoon Rammasun (2008). As extratropical transition occurs, the warm core is disrupted at 100 mb (Ch. 8) followed by 200 mb (Ch. 7) as exhibited in the images below of Rammasun (2008) as it underwent extratropical transition. At this point the analyst should classify the system as “becoming extratropical.” According to Roger Edson, loss of deep ice convection (seen in the 85 GHz) near the TC center and expansion of the winds away from the center and into a horseshoe-like appearance are some of the characteristics of extratropical transition in the microwave and scatterometer data (Fig. Figure 3-1 showing signals of extratropical transition in QSCAT (above) and MW imagery (below). 4. The Classification Process 4.3 Analysis Techniques 4.3.1 Determining Position The purpose of this section is not to on conventional infrared (IR) and visible (VIS) geostationary satellite data, but rather to draw attention to ancillary satellite data and other techniques that can aid the analyst in determining the center location of a tropical cyclone.
NESDIS_SAB_Operational_Procedures.docx